摘要
本文提出了一种有限体积时间推进法,将其应用于均化N-S方程的求解,模拟跨音扩压器的湍流流场,并采用空间变时间步长和多重网格技术加快收敛速度。计算结果与有关文献的实验数据吻合良好。
A time marching method in finite volume is presented and applied to time dependent, Reynolds averaged Navier-Stokes equations for transonic diffuser turbulentflows. A two-layers algebraic turbulent model, proposed by Baldwin-Lomax is used for the eddy viscosity function μT. An explicit, two steps time marching method is presented. In the predicting step downwind difference is used in the streamwise direction and central difference in the transverse direction. In the correcting step upwind difference in the streamwise direction and central difference in the transverse direction are applied. The method is first order in time and second order in space. An artificial viscosity or smooth factors are needed to inhibit the numerical oscillation. The uneven time steps and multi-grid techniques are used to accelerate the convergence. The results of the calcalation are in good agreement with experiments.
出处
《航空学报》
EI
CAS
CSCD
北大核心
1992年第1期A042-A047,共6页
Acta Aeronautica et Astronautica Sinica
