本文基于跨音速平面叶栅试验台的搭建,对入口风洞收缩段进行设计。在收缩比确定的情况下,采用流场特性较好的五次曲线。同时从实际角度出发,重点研究收缩段的长高比(长度与入口高度比值)对出口流场的影响,综合对比不同长高比收缩段出口流场品质(压力、马赫数、边界层厚度等),获得了最优长高比,期望为跨音速平面叶栅实验风洞收缩段的优化设计提供了参考。 Based on the construction of transonic plane cascade test bench, this paper designs the contraction section of inlet wind tunnel. In the case of the contraction ratio is determined, the fifth curve with better flow field characteristics is adopted. At the same time, from the practical point of view, the influence of length-height ratio (ratio of length to inlet height) on outlet flow field was mainly studied, and the outlet flow field quality (pressure, Mach number, thickness of boundary layer, etc.) of different length- ), The optimal aspect ratio is obtained, which is expected to provide a reference for the optimal design of the contracted section of transonic plane cascade experimental wind tunnel.