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针对马赫数可控的方转圆内收缩进气道设计了抽吸方案,并通过风洞试验和数值仿真手段研究了其对进气道性能的影响,获得了进气道设计点的工作特性及自起动性能。试验结果验证了抽吸对提升内收缩进气道性能的有效性:在顶板下洗气流集中区域开槽减小了出口涡流区以及提高了抗反压能力,相对原型进气道,设计点(Ma=6.0)放气流量为0.99%的实际捕获流量时出口总压恢复系数提高了3.8%,临界反压从135倍来流静压提高到了150倍。此外,在顶板分离区开槽可以提高进气道的自起动能力,Ma=5.0,攻角AOA=4°时实现了自起动,此时放气流量为0.78%的进口捕获流量,起动后出口增压比和总压恢复系数分别为30.6和0.600。
In this paper, a suction scheme was designed for the contracted inlet of a round tube with Mach number controllable. The influence of the suction path on the performance of the air intake was studied by wind tunnel test and numerical simulation. The operational characteristics of the intake port design point And self-starting performance. The test results validate the effectiveness of suction on the performance of the inner shrunken inlet: Slotting at the concentrated area of the shim air under the roof reduces the outlet swirling area and improves the anti-backpressure capability, compared to the prototype inlet, design point ( Ma = 6.0). The total pressure recovery at exit increases by 3.8% with the actual capture flow rate of 0.99% and the critical backpressure increases from 135 times the hydrostatic pressure to 150 times. In addition, notching in the roof separation zone improves the self-starting ability of the inlet duct, Ma = 5.0, self-starting at AOA = 4 ° at which time the bleed air flow is 0.78% The pressurization ratio and total pressure recovery coefficient are respectively 30.6 and 0.600.