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A numerical method is used to compute the unsteady transverse jets flow and study the air-fuel mixing characteristics in the unsteady flowfield. The unsteady compressible Navier-Stokes equations are solved using a high-order AUSM+ method with dual-time-step implicit time scheme. It is found that the transverse jets flowfield is very unsteady and the unsteadiness is caused by the primary vortices emanating...
Three-dimensional, unsteady Navier-Stokes equations have been solved to calculate the mixing between secondary injections at three different injection angles interact with the supersonic primary flow within the Hypersonic Low Temperature (HYLTE) nozzle. Results show that contact surface strentching and streamwise vortices especially counter vortex pairs (CVP) dominate and accelerate mixing. And the...
A computational fluid dynamics code for multispecies, Favre-Averaged Naveir-Stokes equations is developed to simulate the turbulent supersonic two-dimensional reacting flow. The explicit ENO scheme (third order of accuracy) has been used to solve the system of equations, and algebraic Baldwin-Lomax's turbulence model to calculate the eddy viscosity coefficient. For the description of processes of...
Pulse detonation engines (PDE) have received significant attention in recent years due to their potential advantages over conventional propulsion systems, including high thermodynamics cycle efficiency, high thrust/weight and specific impulse. The fuel-air injection and mixing is one of important research issues. To optimize the fuel-air injection and mixing, a three-dimensional computation model...
The injection device is widely used in various industrial fields. The liquid-liquid single-phase flow flied of injection device was simulated with computational fluid dynamics (CFD) software FLUENT based on standard K-epsiv two-equation turbulent mode. The results showed that: the fluid movement disorder at the entrance of mixing chamber and is even more confusion when into the interior with the phenomenon...
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