【摘要】 本文提出了一种计算高速风洞三维过渡段的气动特性的方法。本方法是以一维管流解为基础,并通过坐标变换,将变系数的线化速度势方程化为波动方程(对超音速流)或拉普拉斯方程(对亚音速流),然后用有限基本解法求解。本文着重讨论了超音速流求解的过程。在超音速流时,对矩形实验段区域,则采用分离变数法求解。作为例子,计算了由圆变方的超音速流过渡段,得出了三维变化对实验段气流参数的影响。更多还原

【Abstract】 A method to compute aerodynamic characteristics of three-dimensional transitive section of high speed wind-tunnel has been suggested.The method is on the basis of the theory of one-dimensional flow in pipe,and through axis variation to turn the velocity potential function into a wave equation for the supersonic flow,or a Laplace equation for the subsonic flow.Then,the finite elementary solution method is used to solve it.The present paper discusses chiefly solving process of supersonic flow.When the flow is a supersonic one,separation of variables will be used for a square experimental section.As an example,the influence of the transitive duct turnning a circular section into a square one on flow parameters in experimental section has been calculated.更多还原