喷流与超声速主流粘性干扰流场的数值模拟

采用二维雷诺平均Navier-Stokes(N-S)方程时具有声速喷流的超声速主流干扰流场进行了数值求解。N－S方程的无粘项采用有限体积法在非结构网格上进行空间离散,通量分裂采用二阶精度的Vanleer格式,紊流粘性系数采用Bald-win-Lomax二层代数紊流模型计算。对当地时间步长进行了粘性修正,并发展了一种基于线化流量的逆风隐式格式以提高求解效率。

Numerical Simulation on Viscous Supersonic Crossflow with Jet Injection

The numerical simulation on supersonic crossflow with jet injection was discussed. The two dimensional Reynolds averaged N-S equations were resolved on unstructured grids using finite volume method, the Vanleer fluxes vector splitting scheme was used for the non viscous terms, and the two layers Baldwin Lomax algebraic turbulent model was used for turbulent viscosity. The local time step was corrected due to the viscosity to match the convergence conditions, and an implicit scheme relying on a linearization of fluxes was developed to obtain higher convergence efficiency.