As an active flow field control technology, reverse jet and rectifier cone can significantly affect the flow field around the high-speed aircraft and reduce the drag and heat of high-speed aircraft to a certain extent. In this paper, the CFD numerical method is used to simulate and analyze the flow around the bluff body front rectifier cone and the reverse jet interference flow field. Further considering the combination of the two, the flow field structure around the bluff body under the combination of rectifying cone and reverse jet flow was simulated. Research shows, for the flow field of a single reverse jet, the pressure ratio of the reverse jet to the main flow has a significant effect on the drag reduction performance. With the change of the pressure ratio of the jet to the main flow, two modes of long jet and short jet will appear. The structure of the short jet modal flow field is relatively stable. However, with the increase of attack angle, the shear layer of free flow will attach to the shock wave and form hot spot, which is a great threat to high-speed aircraft. When the rectifier cone and the reverse jet are combined, within a certain angle of attack, the wall will not form a reattachment shock wave. The area behind the bow shock and in front of the aircraft head is a free-state zone, which has a good cooling effect on the aircraft head. At the same time, the static pressure on the wall is reduced, which has a very good drag reduction effect.

中文翻译：

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射流与整流锥联合流场控制技术研究

作为主动流场控制技术，反向喷射和整流锥可显着影响高速飞机周围的流场，并在一定程度上降低高速飞机的阻力和热量。本文采用CFD数值方法模拟和分析了钝体前整流锥周围的流动和反向射流干扰流场。进一步考虑两者的结合，模拟了在整流锥和反向射流共同作用下钝体周围的流场结构。研究表明，对于单个反向射流的流场，反向射流与主流的压力比对减阻性能有重大影响。随着射流与主流压力比的变化，将出现长射流和短射流两种模式。短射流模态流场的结构相对稳定。然而，随着迎角的增加，自由流动的剪切层将附着在冲击波上并形成热点，这对高速飞机是一个巨大的威胁。当整流锥和反向喷流在一定的迎角范围内结合时，壁将不会形成重新附着的冲击波。弓形激波后面和飞机机头前面的区域是自由状态区域，该区域对飞机机头具有良好的冷却效果。同时，减小了壁上的静压，具有很好的减阻效果。当整流锥和反向喷流在一定的迎角范围内结合时，壁将不会形成重新附着的冲击波。弓形激波后面和飞机机头前面的区域是自由状态区域，该区域对飞机机头具有良好的冷却效果。同时，减小了壁上的静压，具有很好的减阻效果。当整流锥和反向喷流在一定的迎角范围内结合时，壁将不会形成重新附着的冲击波。弓形激波后面和飞机机头前面的区域是自由状态区域，该区域对飞机机头具有良好的冷却效果。同时，减小了壁上的静压，具有很好的减阻效果。