非定常可压缩湍流运动方程初探

本文从粘性可压缩非定常流这种最一般形式的纳维——斯托克斯方程和连续性方程出发,利用时均化概念,同时考虑到运动中各参量的不同特性而将其分为随机性和非随机性的,将基本方程进行了时均化处理及变换,初步揭示了粘性可压非定常湍流由于脉动引起的流体动力方程中的有关附加项、能量的变化形式以及运动中的应力问题,分析了粘性和脉动在流体运动中各方面的作用。

PRIMARY STUDY ON EQUATIONS OF UNSTABLE COMPRESSIBLE TURBULENCE

Based on the most common kind of Navier-stokes Equations and cont-inual equations for viscous compressible unstable fluid flow, using temporal average concept and,in the mean time, considering the different charactcrisics, all elements are divided into random and nonrandom parameters, the basic equations are treated by the way of temporal average and transformation.This paper discusses primarily the additional elements in fluid dynamical equations, the changed forms of energy and the problems of stress due to fluctuationl in this kind of fluid and, analyzes the function of viscidity and fluctuation in each aspect of fluid flow.