高精度高分辨率迎风格式应用于不同速度范围内粘性流动  

APPLICATIONS OF HIGHER-ORDER HIGH RESOLUTION UPWIND SCHEME FOR VISCOUS FLOW FROM LOW SPEED TO SUPERSONICS

作　　者：袁新[1] 

机构地区：[1]清华大学热能工程系,北京100084

出　　处：《工程热物理学报》1997年第2期164-168,共5页Journal of Engineering Thermophysics

摘　　要：提出了一种适合于不同速度范围的高精度高分辨率的迎风有限差分格式，并基于此数植模型发展了适应于速度范围极宽的非定常粘性流动通用软件，不仅适用于超音速下捕捉强间断面，跨音速及高亚音速下捕捉弱间断面和滑移面，还可以精确地模拟低速情况下的粘性流动。此软件可分别用于研究内流和外流的流动特性以及预估其粘性损失。A fourth order high resolution upwind scheme is proposed for solving the compressibleNavier-Stokes equatons. The present numerical scheme has the higher accuracy, higherresolution, better stability and faster convergency for the unsteady viscous flow from lowspeed to supersonics. A unsteady viscous solver based on the present scheme is developedand applied to the aerothermodynamic computation that contains the captures of shockwave, shock-vortex interaction, and weak discontinuity like slip surface or contact surface.The present solver can well estimate not only the performances but also the fluid dynamiclosses of the internal and external flow problems, respectively. Especially, it is suited forsolving the unsteady three-dimensional flows.

关 键 词：N-S方程 高分辨率格式 粘性流动 非定常流动 

分 类 号：O357.1[理学—流体力学]