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采用二维轴对称模型,以理想空气为介质对超音速旋流分离装置内的流场特性进行了数值模拟。同时搭建实验平台,对小压比条件下影响流场特性和分离性能的结构和操作参数进行了研究。研究结果表明:进出口压比为1.4同时排液通道外壁张角小于12°时,超音速喷管扩张段内在面积比达1.27的情形下仍不存在气动激波,同时对扩张段内存在激波产生的情况进行分析,得出其原因为在排液口内产生反向压缩波,并向喷管上游移动。通过实验研究得出,压比为1.4,面积比为1.27时超音速旋流分离器分离效率最高,达到20.5%。
A two-dimensional axisymmetric model was used to simulate the flow field in supersonic swirling flow separation device with ideal air as medium. At the same time, an experimental platform was set up to study the structure and operating parameters of the flow field and separation performance under a small pressure ratio. The results show that there is still no aerodynamic shock when the pressure ratio of inlet and outlet is 1.4 and the opening angle of the outer wall of drainage passage is less than 12 °, and the inner area ratio of supersonic nozzle expansion reaches 1.27. Wave generated by the analysis of the situation, come to the conclusion that the reverse pressure wave generated in the discharge port, and to move upstream nozzle. The experimental results show that the separation efficiency of supersonic cyclone separator is the highest at a pressure ratio of 1.4 and an area ratio of 1.27, reaching 20.5%.