对两类典型的侧压式进气道在来流Ma=1.5~5.0范围内的起动性能开展数值模拟研究,研究了几何高度对进气道性能的影响.研究发现:不同高度的进气道起动过程所表现出来的流场特征差别较大,对于合适的高度,进气道未起动时的性能大为改善,起动过程的性能变化趋于平缓,起动马赫数较小(存在最小值),此时进气道具有较好的起动性能并能在来流马赫数小于自起动马赫数时较好工作. The numerical simulation research on the start-up performance of two types of typical side-pressure inlet in the range of Ma = 1.5-5.0 is carried out, and the influence of geometric height on the performance of the inlet is studied. It is found that the inlet of different height The characteristics of the flow field exhibited by the start-up process are quite different. For the suitable height, the performance of the intake passage is greatly improved when the intake port is not started, the performance of the start-up process tends to be gentle, the starting Mach number is smaller (minimum exists) At this point the inlet has a good starting performance and can work better when the Mach Mach number is less than the self-starting Mach number.