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为了研究进口形状对高超声速内转式进气道低马赫数起动特性的影响,设计了分别具有矩形、正方形、椭圆形、圆形进口形状的4个进气道,然后利用仿真方法对其不起动/再起动流场结构进行了分析.结果表明:矩形和椭圆形进口进气道的再起动马赫数相近,正方形和圆形进口进气道的再起动马赫数相近,且后两者的再起动马赫数偏高.进一步分析发现,再起动能力的差异可能是由进口的宽高比不同所导致,因此设计了不同宽高比系列的进气道,并对其不起动/再起动流场结构进行了研究.结果表明:进口宽高比对进气道起动性能具有显著影响,在一定范围内宽高比越大,其再起动能力越强.
In order to study the influence of the shape of the inlet on the low Mach number starting characteristics of the hypersonic internal transitional inlet, four inlets with rectangular, square, oval and circular inlet shapes were designed and then simulated by simulation Start-up / restart flow field structure is analyzed.The results show that the re-starting Mach number of the rectangular inlet and the oval inlet are similar, the Mach-number of restart of the inlet of the square and the circular inlet is similar, Starting mach number is too high.Further analysis found that the restart ability differences may be caused by the different aspect ratio of imports, so the design of different aspect ratio of the inlet, and its start / restart flow field The results show that the inlet aspect ratio has a significant influence on the starting performance of the intake passage, and the greater the aspect ratio is, the stronger the restarting ability is.