三元收缩段优化设计研究

Research of optimized design of three-dimensional contraction

本文以某低速风洞收缩段为例,对收缩段设计方案的数值计算结果进行了综合分析。文中给出了数值计算结果、分析过程以及典型算例,并给出了该风洞收缩段最佳的气动设计方案,分析了几种常用收缩曲线的特点,同时给出了低速风洞收缩段气动设计的优化过程和可行的方法。结果表明,本文提出的优化设计方法是风洞三元收缩段气动设计较好的有效的气动设计手段。

The mission involved in this paper concerns a low speed wind tunnel project. the contents of the research are:(1) choose optimum calculated method; (2) optimum design using chosen method. In this paper with the object of a certain low speed wind tunnel contraction, the numerical computed results for contraction aerodynamic design plan have been analyzed synthetically. The optimum aerodynamic design plan has been given as well as the numerical computed results, analyzing process, and typical calculated examples. Meanwhile, the respective characteristics of several contraction curves, the general process and the reliable method for optimized design of wind tunnel contraction have been provided. The results make known the design method which this paper given is a much effective analysis and design means for aerodynamic design of three-dimensional contraction. To simulate numerically the low speed wind tunnel contraction with Laplace equation and N-S equations shows that adapted Xm=0.38,double cubic calculated method is the optimum design plan without separation occurs and with excellent flow field quality in the contraction.