实用S形进气道内部流动特性研究  

AN INVESTIGATION ON FLOW BEHAVIOUR IN AN S-SHAPED DUCT

作　　者：马汉东[1] 汪翼云[1] 

机构地区：[1]北京空气动力研究所

出　　处：《航空动力学报》1997年第2期203-205,共3页Journal of Aerospace Power

摘　　要：根据ＹａｎｇＪＹ的思想构造了一种求解湍流ｋ－ε模型方程的有限差分格式—湍流Ｕ－格式。采用此种方法以及一种完全Ｎ－Ｓ方程解算器对变截面Ｓ形弯曲进气道内部旋涡湍流运动进行了研究，通过大量型号设计与计算证明了本套方法可以正确地描述流场中的分离、二次旋涡等重要物理现象。作为一种特例，本文给出了一种Ｓ形进气道内部流动的数值模拟结果，并与圆截面Ｓ形弯管的计算结果进行了定性比较。A new efficient finite-difference scheme for solving turbulence K-ε equations-Turbulence U-scheme has been developed.This method was combined with the solver of Navier-Stokes discreted by a modified Beam-Warming scheme to investigate three-dimensional turbulent internal flow in S-shaped duct.Many numerical experiments and practical applications show that this method provides detailed flow field and parameters for engineering design.As a special example,a numerical simulation has been completed for an S-shaped duct including separation,secondary flow,vortices etc.The comparison of its results with the flow patterns in the circular section s-shaped duct shows a good agreement in essence.

关 键 词：进气道 流动特性 航空发动机 

分 类 号：V231.3[航空宇航科学与技术—航空宇航推进理论与工程]