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在来流马赫数为3.85条件下,开展了移动唇口可变收缩比侧压式进气道反压特性和自起动性能风洞实验.研究了不同内收缩比条件下,侧压式进气道抗反压性能和起动性能.实验结果表明:在正常工作条件下,侧压式进气道内收缩比大小影响其抗反压能力,内收缩比1.19的侧压式进气道能抗23.42倍反压,内收缩比1.24的侧压式进气道能抗26.44倍反压,内收缩比较大的进气道抗反压能力强;不能自起动的侧压式进气道,通过移动唇口减小其内收缩比,可以顺利实现自起动.
Under the Mach Mach number of 3.85, a wind tunnel experiment was carried out to study the counter-pressure characteristics and the self-starting performance of the movable lip variable contraction ratio side-pressure inlet, and the effects of different types of internal contraction ratio Anti-back pressure performance and start-up performance.The experimental results show that under normal working conditions, the side-pressure type inlet affects the anti-back pressure capability, and the side-pressure inlet with internal contraction ratio of 1.19 can resist 23.42 times Back pressure, the contraction of the ratio of 1.24 side of the pressure-type inlet can resist 26.44 times the back pressure, the larger the contraction of the anti-anti-backwind ability of the inlet; can not be self-starting side pressure inlet, through the mobile lip Reduce the internal contraction ratio, you can successfully achieve self-starting.