High mach flow. After a short region of supersonic flow, a Jul 1, 2023 · To characterize the impact of thermal nonequilibrium conditions in shock-induced combustion in high Mach number scramjet engines, a comparative numeri… Dec 15, 2022 · By using more accurate equilibrium population g i e q, the present numerical method shows the enhancement of stability, especially at high Reynolds and Mach number flows. With high capital cost and technology risk of both flight and ground test, CFD technologyhas been more and more applied to resolve Shock Wave Laminar Boundary Layer Interaction Over a Double Wedge in a High Mach Number Flow by Mohammad Ali Badr In previous chapters, flows have been governed by mass and momentum equations only, density changes due to the flow have been insignificant, and the Mach numbers have been less than about 0. 12 I got a warning below during the calculation with Solidworks Flow Simulation. The implementation of the WENO ensures that solutions behave with minimal or no oscillations Sep 25, 2019 · In the present study, numerical investigation of the turbulent flow over a biconvex airfoil at compressible and high Mach numbers flow is done using computational fluid dynamics (CFD). 03-5. One of these changes is the appearance of shock waves in which the speed drops and the pressure rises dramatically over a very thin May 13, 2021 · As the speed of the object approaches the speed of sound, the flight Mach number is nearly equal to one, M = 1, and the flow is said to be transonic. The High Mach Number Flow, Spalart–Allmaras (hmnf) interface (), found under the High Mach Number Flow>Turbulent Flow branch () when adding a physics interface, is used to model gas flows at high Reynolds number where the velocity magnitude is comparable to the speed of sound, that is, turbulent flows in the transonic and supersonic range. Accordingly, a drag model under a high Mach number and a low Reynolds number condition is necessary to perform analysis that considers the influence of the particle on the jet flow. Introduction The purpose of this applet is to simulate the operation of a converging-diverging nozzle, perhaps the most important and basic piece of engineering hardware associated with propulsion and the high speed flow of gases. Secondly, high Mach numbers are caused by high blade speeds, which enable greater work input to the flow and, hence, higher pressure ratios. The advantages of the Oct 1, 2025 · 1. If the Mach number of the flow is determined, all of the other flow relations can be determined. May 10, 2025 · Example: Military fighter jets (Mach 1. Jan 3, 2025 · Abstract: Aerobreakup in the stagnation region of high-Mach number flow over a bluff body is studied with experiments and computations. We treat four cases of MHD equilibria with flow, developing their asymptotic expansions in full, and for an application consider the effect of the flow on the Shafranov shift. With that out of the way, my question: Why does Solidworks Flow Simulation do high mach number flow? It seems like a fairly specialised application, or am I mistaken? Is high mach number flow common in design engineering flow problem statements? Hypersonics is the field of study of a very particular class of flows that develop around aerodynamic bodies moving in gases at exceedingly high velocities compared to the speed of the sound waves. Compressibility effects are encountered in gas flows at high velocity and/or in which there are large pressure variations. but when i change slightly dimension of the airfoil ,simulation ABSTRACT study was made to evaluate the potential improvements in aircraft turbine engine perfor- mance by incorporating unique supersonic through-flow fans. Since the pressure gradient normal to the flow within a boundary layer is approximately zero for low to moderate hypersonic Mach numbers, the increase of temperature We will calculate the Mach number, pressure and temperature distribution in the nozzle using FLUENT and compare the solution to quasi-1D nozzle flow results. Notably, the When I selected the 'high Mach flow' option I received this warning: Maximum Mach number exceeded dV/V=267. However, thermo-chemical non-equilibrium effect caused by the high total temperature makes it arduous to accurately predict the flow inside a high Mach number inlet by employing the traditional MOC method. AI generated definition based on: Microfluidics: Modelling, Mechanics and Mathematics, 2017 Feb 17, 2022 · Mach flow: Vel/Sqrt (1. The description of the gas environment surrounding a hypersonic vehicle is important for the calculation of thermomechanical loads on the body. Using the In the present study, numerical investigation of the turbulent flow over a biconvex airfoil at compressible and high Mach numbers flow is done using computational fluid dynamics (CFD). I'm designing a rocket nozzle, so I know that there's going to be high mach number, and when I use the solver WITHOUT high mach number option selected, it completes fine but gives me a bunch of warnings about supersonic flow. In addition to the Tollmien-Schlichting modes, there exist higher modes in a channel flow that do not have a counterpart in the incompressible limit. At some places on the object, the local speed exceeds the speed of sound. Plasmas 20, 024504 (2013)]. The present work is description of flow field around a hemispherical nose cylinder with a new combination of spike and counterflow jet at free stream of Mach number of 6. With waterjet, you've got the versatility to cut any material, any shape, and any size. The present work is description of flow field around a hemispherical nose cylinder with a combination of spike and counterflow jet at free stream of Mach Jul 14, 2020 · Problem with the computation in High mach number flows Posted Jul 14, 2020, 7:03 a. Boundary layers occurring on hypersonic vehicle airframes are significantly influenced when impinged upon by shock waves. Sep 16, 2013 · Here, we use a recent expansion technique which employs a variational principle to simplify the process [E. This enabled the study of aerobreakup at high Mach (3. After ignition, a local hotspot near the contact surface between the combustion product and fresh reactant facilitates the generation of new detonation wave Sep 25, 2024 · A numerical study of shock-induced thermochemical nonequilibrium effects within a high Mach flow field of the electre vehicle is conducted by employing a two-temperature model-based solver hy2foam. 4*287*Totat Temp) and Courant Number:1 and I am not sure, why I am getting such a high temperature and Impossible Mach number through the T-channel. 3 (since the density change due to velocity is about 5% in that case). 3 × 107 are considered. Dec 2, 2015 · Experiment Name : Flow over a wing with leading-edge rotation. This allows you to turn on additional complex values, such as heat sources and fans. Mach Number and Speed of Sound Mach number (M) is the ratio of the local flow velocity (U) to the local speed of sound (a) : M=U/a. This device was invented by Carl de Laval toward the end of the l9th century and is thus often referred to as the 'de Laval' nozzle. Nov 28, 2020 · Hello, I was wondering if we can consider a high Mach number flow as viscous ? The first thing is: if we try to solve the Navier-Stokes equation for The High Mach Number Reacting Turbulent Flow, Spalart–Allmaras () multiphysics interface is used to simulate the transport and reaction of species in turbulent gas flows where the velocity magnitude is comparable to the speed of sound in the gas, that is, flows in the transonic and supersonic range. The medium can be a gas or a liquid. 1 Introduction Man has strived to make objects fly faster, first from subsonic to supersonic and then to hypersonic speeds. EST Fluid & Heat, Computational Fluid Dynamics (CFD) Version 4. 5-1. For compressible flows, energy and equation of state must be used to account for large changes in pressure, density, energy and entropy that occur for high Mach number flows. Hypersonic speeds lead to complex flow dynamics, including extreme shock 55 Hypersonic Flight Vehicles Introduction Hypersonic flight is generally defined as speeds at or beyond Mach 5. multiple temperature and energy modes) A portion of the large kinetic energy associated with flow at high Mach numbers transforms into internal energy in the fluid due to viscous effects. "The flow has high Mach Number, the "High Mach Number flow" option is recommended. There are three versions of the same predefined multiphysics interface (all with the name hmnf) that combine the heat equation with either the laminar or turbulent flow equations. The speed of sound is equal to the speed of transmission of small, isentropic disturbances in the flow. Firstly, high relative Mach numbers in a compressor imply a high mass flow per unit area, which leads to a more compact (lower diameter) machine for a given mass flow. Hypersonic Flow (Mach > 5) Hypersonic flow is characterized by a Mach number greater than 5. It also did not converge, but simply stopped when the number of iterations hit 3200. Aug 11, 2023 · Compressible flow is a flow that changes in density under pressure, whereas incompressible flow does not. Hameiri, Phys. The flow tube can be formed by solid walls or a sharp boundary between two media with very different states or properties (liquid versus gas; rarefied gas versus shock wave at edge, etc. , which at high-Mach number flight is set by the airflow. To simulate high Reynolds and Mach number (M a) flows efficiently, we adopt a shifted lattice scheme, stabilized by relaxation time depending on the Knudsen number. The High Mach Number Flow, Laminar (hmnf) interface (), found under the Fluid Flow>High Mach Number Flow branch () when adding a physics interface, is used to model gas flows at low and moderate Reynolds number where the velocity magnitude is comparable to the speed of sound, that is, laminar flows in the transonic and supersonic range. Computational fluid dynamics (CFD) is increasingly capable of fulfilling this role. This equation is referred to as Hugoniot's theorem or the Area- Mach number relation. Nov 1, 2019 · In this paper, high-Mach-number compressible flows with shock waves are successfully simulated by Hermite-expansion-based lattice Boltzmann (LB) method proposed in the framework of the double-distribution-function approach. This interaction can lead to flow separation which can cause vehicle stall, structural damage, and inlet Oct 15, 2020 · Also "High Mach number flow" Physics have Rans k-w model and there is no LES terbulant model in it. What does this expression tell us about the role of the Mach number in compressible flows? For low speed, or subsonic conditions, the Mach number is less than one, M < 1 and the square of the Mach number is very small. Based on above improvements and previous developments for global cut-off and expansion shock improvement Roe scheme for all Mach-number flow (Roe- The stagnation temperature change required for the flow to pass from a given initial Mach number to a final Mach number is found from Replace the temperature term on the right-hand-side in each of the following relations. In some industrial applications involving fluid flow, the flow velocity is large enough to introduce significant changes in the density and temperature of the fluid. 9), Weber 5: Hugoniot's theorem (Area-Mach number relation) A [m] flow area. Aug 28, 2024 · Mach Number – Definition, Formula, Classification, Uses, Examples Mach Number is a dimensionless quantity in physics that describes the ratio of the speed of an object moving through a fluid to the speed of sound in that fluid. Read about these updates and more below. A good indicator is Mach Number. This state is often connected to very low pressures. 3 - The High Mach Number Flow InterfacesTable 5-1 Physical Model Turbulence Jan 1, 2022 · Hypersonic high-enthalpy wind tunnels have been a challenge to ground tests in aerospace research area for decades and its test flow uniformity is one of the most important parameters for evaluating wind tunnel performances. The increase in internal energy is realized as an increase in temperature. CFD Module Updates For users of the CFD Module, COMSOL Multiphysics ® version 6. For high Mach number flow the compressiblilty effects are in most cases dominant in comparison with friction, i. Rotating Machinery, High Mach Number Flow With the new release, the CFD Module allows for the formulation of high Mach number flow Mach number is defined as the ratio of the flow velocity to the speed of sound in the medium, indicating whether a gas flow is incompressible (below 30% of the speed of sound) or compressible (above this threshold). [1] The Nov 7, 2017 · I am working on simulating a transient flow that is compressible and turbulent through a pipe. Jan 1, 2015 · In the design process of rocket, airplane and store separation systems, the aerodynamic of multi-body interactionflow field and the separation problems have been paid great attention by researchers, since they are directly related to the success of the mission. If you go to your input data, you don’t see those in the tree. In this paper, aerobreakup in the stagnation region of high-Mach-number flow over a bluff body is studied with experiments and computations. Water drops of diameter 0. The diffuser is transonic in the sense that the flow at the inlet is subsonic, but due to the contraction and the low outlet pressure, the flow accelerates and becomes sonic (Ma = 1) in the throat of the nozzle. You can think of it like an explosion on one end of the pipe and I am trying to simulate the fluid in the rest of the pipe. Despite the availability of open-source CFD frameworks like OpenFOAM, existing density-based solvers face significant limitations in meeting the demanding requirements of modern hypersonic vehicle design. The aerodynamic heating becomes extremely high, and the effects of compressibility are profound. Named after the Austrian physicist Ernst Mach, the Mach number is crucial in the study of aerodynamics and fluid dynamics. On the other side it is well known that the friction losses decrease with increasing Reynolds number which is the basis of the Ackeret scaling methods and our methods published so far. Compressible flow (or gas dynamics) is the branch of fluid mechanics that deals with flows having significant changes in fluid density. 03–5. Review the derivations of Dec 2, 2014 · CFD,high mach flow Posted Dec 2, 2014, 4:09 a. Prescribing a net mass boundary flux in the Transport of Concentrated Species interface, either using a Flux or Mass Fraction feature, the High Mach Number Reacting Flow feature computes The Stefan Velocity and applies this in May 13, 2021 · The starred conditions occur when the flow is choked and the Mach number is equal to one. See full list on comsol. But what do they mean, how are their values interpreted, and how are they used? Of all the ways to categorize aerodynamic flows Flow Regimes While all gas flow regimes are compressible, we encounter compressibility effects when: ‐ Flow velocities are high ‐ Pressure and density changes are large Any flow can be considered incompressible if the Mach number is less than about 0. A Mach 3 commercial transport mission was considered. Regarding to the performance requirement, theories and methods for designing hypersonic flow nozzles at high enthalpy conditions are quite difficult, but very interesting Apr 26, 2024 · On this page, we will investigate the dependence of the density change on the Mach number of the flow. Although the current formulation only considers spherical objects, generalizations are possible [20]. Introduction Hypersonicflow refers to the fluid flow state with a Mach number exceeding 5, that is, the fluid velocity is more than five times the speed of sound. 30 mm were acoustically levitated at sea level along the flight path of a rectangular 100~mm x 150~mm rail-gun launched projectile. For this reason, the compressible formulation is referred to as Compressible flow (Ma<0. That is Found. In defense applications, aircraft reach hypersonic speeds at high altitude and so may civilian aircraft in the future. If the Mach number reaches a value at which the fluid can no longer be considered incompressible for a given application, then such a velocity is considered high in aerodynamics. Flow is the inventor and world leader in waterjet cutting solutions. I have been unable to get a solution to converge and I'm curious if anyone else has tried to simulate a similar configuration and has experienced problems with external flow when using the High Mach Number Flow module? May 1, 2018 · Restricted to the Mach 10 X-43A flight experiment [10], the significant expense and difficulty of high Mach number flight tests have driven the development of alternative tools to analyse steady scramjet operation. com Aug 2, 2022 · Modal instabilities in a flow through a channel at high Reynolds and Mach numbers are studied for three-dimensional perturbations. Aug 7, 2020 · Nearly all illuminating classic hypersonic flow theories address aerodynamic phenomena as a perfect gas in the high-speed range and at the upper limit of continuum gas domain. May 13, 2021 · where M is the Mach number. Finding Mach Number The Mach number is the ratio of the speed of the aircraft, or the speed of the gas, to the speed of sound in the gas. for the special case of airfoil, simulation for all velocity converged (even for higher than 10 mach number flow) and result are acceptable . also adaptive mesh method employed to finer meshing near shock wave region . Spacecraft and high-speed missiles routinely fly at hypersonic Mach numbers, A4 > 5. I want to make sure I have my viscous model setup Feb 1, 2018 · Heat transfer reduction around blunt bodies is one of the important issues in the field of high speed aerodynamics. To model high Mach number flows, use one of The High Mach Number Flow Interfaces. The Mach number is primarily used to determine the approximation with which a flow can be treated as an incompressible flow. The flow is considered as turbulent, two-dimensional, steady and compressible. Such high Mach numbers have only been achieved by rockets, re-entry spacecraft, and special high-altitude The High Mach Number Flow, Laminar (hmnf) interface (), found under the Fluid Flow > High Mach Number Flow branch () when adding a physics interface, is used to model gas flows at low and moderate Reynolds number where the velocity magnitude is comparable to the speed of sound, that is, laminar flows in the transonic and supersonic range. The simulations are implemented Introduction This application models compressible turbulent gas flow in a supersonic air ejector using the High Mach Number Flow interface in COMSOL Multiphysics. So it is reasonable to model the flow as inviscid. However, most hypersonic flows encounter strong shock We apply the proposed correlation to simulate a high-speed dusty flow over a sphere to show that the surface heating rate is sensitive to the drag correlation used for estimating trajectories of dust particles. Compressible flows The High Mach Number Flow, k-ε (hmnf) interface (), found under the High Mach Number Flow>Turbulent Flow branch () when adding a physics interface, is used to model gas flows at high Reynolds number where the velocity magnitude is comparable to the speed of sound, that is, turbulent flows in the transonic and supersonic range. What is Mach Number? Therefore, flow around each particle has a high Mach number and a low Reynolds number. Right click at the top level, Customize Tree. 0 0 Replies Aug 23, 2022 · A discrete-velocity Boltzmann equation (DVBE) with Bhatnagar-Gross-Krook (BGK) approximation is discretized in time and space using a third-order Runge-Kutta (RK3) and fifth-order weighted essentially nonoscillatory (WENO) finite-difference scheme to simulate benchmark inviscid compressible flows. i am using high mach number flow module k-epsilon method . While all flows are compressible, flows are usually treated as being incompressible when the Mach number (the ratio of the speed of the flow to the speed of sound) is smaller than 0. 1 1 Reply However, there are two key advantages of high Mach number compressor stages. Flow has established a new industry standard with the Mach Series, providing complete solutions for machine systems, software, service, and support. NEMO roadmap Define and implement an eficient thermochemistry interface Augment library of schemes for improved robustness in high Mach Extend BC formulations to account for radiative equilibrium and potentially slip flow (for high-Mach) Formulate and implement models for finite-rate energy exchange (i. The local speed of sound, and hence the Mach number, depends on the temperature of the surrounding gas. The hypersonic flow is quantitatively defined by the Mach number independent principle, which is derived from the asymptotes of the Rankine-Hugoniot relationship. e. Jun 18, 2003 · I have a flow problem statement as follows, There is a big cylinder connected to a small cylinder, which in turn connected to a big cylinder. Dec 1, 2023 · The high-temperature non-equilibrium effect is a novel and significant issue in the flows over a high Mach number (above Mach 8) air-breathing vehicle. Reynolds number losses. The current paper investigates a key step in design of high-Mach scramjet, namely, the compression level to be executed. For this purpose, three Reynolds number of 2. The High Mach Number Reacting Flow coupling feature automatically couples mass transfer on boundaries and applies a corresponding velocity contribution for the flow. In high-speed flight and/or high-altitude flight, the measurement of speed is expressed in terms of a “Mach number”—the ratio of the true airspeed of the aircraft to the speed of sound in the same atmospheric conditions. The difference is that the High Mach Number Flow interface can handle flow of any Mach numbers, while the other physics interfaces are subject to The Mach Number Limit. This applet is intended to help 5 days ago · With the Mach 500, you can rely on Flow to partner with you for service, parts, training, and beyond. Apr 14, 2017 · High Mach Number Flow, Turbulent k-e Modelling Posted Apr 14, 2017, 1:15 p. We are committed to providing you with the tools you need to keep your system running at its best. Engine performance, weight, and mission studies were carried out for conven- tional turbofan engines and for turbofan engines using supersonic through-flow fans. This occurs because the thermodynamic properties of the fluid are coupled. Jun 5, 2024 · Weijie Ren, Wenjia Xie, Ye Zhang, Hang Yu, Zhengyu Tian, Jiajun Zhu; Numerical stability analysis of Godunov-type schemes for high Mach number flow simulations. 30 mm were acoustically levitated at sea level along the flight path of a rectangular $100\ {\rm mm} \times 150\ {\rm mm}$ rail-gun launched projectile. EDT Fluid & Heat, General, Computational Fluid Dynamics (CFD) Version 5. The NASA Turbulence Modeling Resource considers a large number of subsonic flows, some with flow separations, but the only cases at supersonic Mach numbers are a flat plate boundary layer and square duct flow. EDT Computational Fluid Dynamics (CFD) 0 Replies Feb 7, 2025 · A method of characteristics (MOC) plays a crucial role in the inviscid design of conventional hypersonic inlets. 12), post-shock Mach (1. Notice the important role that the Mach number plays in all the equations on the right side of this slide. In this regime, the object is moving at speeds far greater than the speed of sound. Redirecting to /core/product/B34D7F61244B35FEE248A0728678F379 introduced to suppress checkerboard problem, and modified entropy fix and the rotated Riemann solver is combined with complementary advantages as an assistant improvement for better robust. These parameters typically emerge from dimensional analysis in nearly all fluid flow problems. 51-2. 5 to 2). The interplay of these two parameters strongly affects the near-wall dynamics of high-speed turbulent boundary layers (TBLs) in a non-trivial way, breaking similarity arguments on velocity and temperature fields May 13, 2021 · If the Mach number is too low, or the wedge angle too high, the normal shock equations should be used. The High Mach Number Flow, Wilcox R-ω (hmnf) interface (), found under the High Mach Number Flow > Turbulent Flow branch () when adding a physics interface, is used to model gas flows at high Reynolds number where the velocity magnitude is comparable to the speed of sound, that is, turbulent flows in the transonic and supersonic range. m. Using of spikes and counterflow jets each of them separately for reducing of drag force and heat transfer is well known. 4 × 107, 2. greater than 1). ). Analysis Type- External Flow analysis (Time Dependent Analysis) Airfoil- NACA0024 (0. Using of spikes and counterflow jets each of them separately for reducing of drag force is well known. 51–2. 0 brings interfaces for modeling flow in rotating machinery, new functionality for large eddy simulations, and several new tutorial models. 036. Thus, this study attempts to investigate the high-temperature non-equilibrium flows of a curved compression two-dimensional scramjet inlet at Mach 8 to 12 utilizing the two-dimensional non-equilibrium RANS calculations. Apr 18, 2025 · High-fidelity computational fluid dynamics (CFD) simulations play a vital role in advancing hypersonic technologies for aerospace applications. To increase the flight range of high Mach number vehicles, the primary issue in the design of hypersonic vehicles is how to reduce flight drag. 16 Mach Number & Reynolds Number Introduction The dimensionless (or non-dimensional) similarity parameters, Mach number and Reynolds number, have already been introduced. 9 × 107 and 3. May 1, 2025 · The following review will focus on the reacting flow within a high-Mach-number scramjet, examining it from three key perspectives: high-temperature gas dynamics, the design of combustion organization schemes, and the characteristics of nonpremixed combustion. These notes provide a qualitative characterization of Oct 15, 2023 · These contributions enable more accurate and efficient flow solvers across low and high Mach numbers, making CFD more dependable for applications involving a wide range of flow conditions, such as aircraft design. This is because compressibility causes effects in the flow that do not occur in the flow of incompressible fluids or low Mach numbers. LES Terbulant simulation for 0. 2m High Mach Number Flow High Mach number flow is flow that is faster than the speed of sound (Mach no. 4, Version 5. So we expect viscous effects to be confined to a small region close to the wall. A numerical study of shock-induced thermochemical nonequilibrium effects within a high Mach flow field of the In this model the high speed turbulent gas flow in a converging and diverging nozzle is modeled using the High Mach Number Flow interface. 3. Ejectors are simple mechanical components used to induce a secondary flow by momentum and energy transfer from a high-velocity primary jet. Nov 8, 2011 · The idea is to simulate gas flow into a vacuum chamber through a simple nozzle. Dec 14, 2023 · High Mach Number Flow Fluid Mixing Rotation or Movement Cavitation In this study, I want to create a fan and a heat source. 9 mach number is possible in COMSOL multiphyics? if yes please let me know how?. However, unlike what happens as the aircraft approaches Mach 1, there are no distinctive changes in the flow characteristics as an aircraft reaches hypersonic Mach numbers. This area of fluid dynamics is particularly interesting because of the changes in flow behaviour that occur when the flow becomes supersonic. The high-energy fluid (primary flow) passes through a convergent-divergent nozzle and reaches COMSOL 6. This study presents shockFluidX, a novel Oct 27, 2023 · High-speed vehicles experience a highly challenging environment in which the freestream Mach number and surface temperature greatly influence aerodynamic drag and heat transfer. The air Jun 5, 2024 · Request PDF | Numerical stability analysis of Godunov-type schemes for high Mach number flow simulations | Modern shock-capturing schemes often suffer from numerical shock instabilities when The High Mach Number Flow, Spalart-Allmaras (hmnf) interface (), found under the High Mach Number Flow>Turbulent Flow branch () when adding a physics interface, is used to model gas flows at high Reynolds number where the velocity magnitude is comparable to the speed of sound, that is, turbulent flows in the transonic and supersonic range. The Mach number is defined as where a is the speed of sound. Then the left hand side of the equation is very small, and the change in density is very small. Thus the use of turbofadturbojet over a wide Mach number range would be required to meet two key criteria: (1) matching of the inlet flow delivery capability to the maximum engine flow capability, and (2) matching the Jan 7, 2015 · Hi i want to simulate an airfoil in high mach flow . 3) in COMSOL Multiphysics. When the flow velocity approaches or exceeds the speed of sound of the gas or when the pressure change in the system () is large, the variation of the gas density with pressure has a significant impact on the flow velocity, pressure, and temperature. The Reynolds number for this high-speed flow is large. Vehicles designed for hypersonic speeds are tested in high Mach number wind tunnels to understand the effects of aerothermodynamic phenomena which occur during flight. Oct 12, 2023 · This study conducted 3D numerical simulations to investigate the impact of combustion chamber diameter on the combustion characteristics of liquid kerosene scramjet rotating detonation under high Mach number flow conditions (Ma6/28 km). Apr 1, 2017 · Drag reduction at high speed flows around blunt bodies is one of the major challenges in the field of aerodynamics. May 15, 2024 · Abstract High-Mach scramjet is one of the most promising air-breathing propulsion devices to realize integration of air and space transportation. For the problem given on the slide, a supersonic flow at Mach number M approaches a wedge of angle a. Sep 25, 2024 · As Mach number increases, thermochemical nonequilibrium is recognized as potentially affecting the flow field structure, as well as mixing and combustion characteristics, where shock-induced thermochemical nonequilibrium is a common and crucial phenomenon in compressible flow fields. For Mach regimes 1 - 4, HSN with increasing levels of stabilization are used to achieve fast convergence, while maintaining a high level of solution accuracy. cc 0j4f76 scp jes qxo cbs xmw gqe ndlmsql n7vzoq