为了改善宽马赫数范围工作的进气道性能,对矩形截面高超声速变几何进气道进行了研究,提出并设计了一种包括唇口开启、唇口后退等几何动作的变几何进气道设计方案.据此在马赫数Ma=4.0～6.5范围内设计了矩形截面高超声速变几何进气道,采用数值仿真方法对其气动性能开展了研究,并与定几何进气道性能进行了对比.研究结果表明:设计马赫数及高于设计马赫数条件下,变几何进气道与定几何进气道的性能基本相同.低于设计马赫数时,变几何进气道的性能明显优于定几何进气道.%In this paper, based on the fixed hypersonic inlet with rectangular section, a new concept of variable geometry hypersonic inlet that the tip can turn and move back off to increase the mass capture ratio is presented, and operating in a large Mach number range from 4 to 6. 5. The flow in the hypersonic inlet was analyzed with numerical analyzer,and the inlet performance comparisons were made between the variable geometry hypersonic inlet and fixed inlet at different Mach number of inflow. The results indicated that the performance of the variable geometry inlet as much as fixed one under design Mach number, and the performance of the variable geometry inlet was better than fixed inlet under non design point. All of that indicate that the variable geometry hypersonic inlet was satisfying.
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