埋入式进气道流场控制研究

 针对埋入式进气道总压恢复系统数低、畸变大的特点,提出了利用扰流器对埋入式进气道进行流场控制的方案。通过吹风实验,分析了扰流器的轴向位置、长度、高度、安装角、数目等对埋入式进气道性能的影响。研究结果表明,提出的流场控制方案可以大幅度提高进气道总压恢复和降低流场畸变,总压恢复σ可提高 3.5%以上,流场畸变指数 Δσ可降低 5.4 2 %以上,使埋入式进气道的性能达到可应用的水平,为埋入式进气道流场控制提供理论和设计依据。

FLOW FIELD CONTROL ON THE SUBMERGED INLET

The development of this paper is based on the project of a type of cruise missile. In order to improve the performance of the submerged inlet, a method of flow field control, installing spoilers before the entrance of the inlet, is considered. The influence of some factors such as axial position, length, height, angle of installation and number of the spoilers on the performance of the submerged inlet is investigated by carrying out experiments in the wind tunnel. The results show that the pressure recovery is increased significantly(more than 3.5%)and the distortion is greatly decreased (over 5.42%). This method can make the submerged inlet highly applicable. The experimental results provide useful reference for the theory and design of flow field control on the submerged inlet.-=