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基于带抽吸槽的二维混压式超声速进气道,开展了脉冲式抽吸对进气道自起动特性的影响研究。通过给定非定常边界条件,对飞行马赫数为2.2、抽吸背压脉动幅值为20000 Pa的进气道非定常流场进行了数值模拟。与定常条件下数值模拟结果进行对比,结果显示脉冲式抽吸能够改善进气道的自起动特性,且脉冲频率及波形均对自起动特性产生影响。
Based on the two-dimensional mixed-pressure supersonic inlet with suction groove, the influence of pulsating suction on the self-starting characteristics of the inlet was studied. Through the given unsteady boundary conditions, the numerical simulation of the unsteady inlet flow field with flight Mach number 2.2 and suction back pressure pulsation amplitude 20000 Pa is carried out. Compared with the results of numerical simulation under steady conditions, the results show that the pulsating suction can improve the self-starting characteristics of the inlet port, and both the pulse frequency and the waveform affect the self-starting characteristics.