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为探讨高超卢速进气道在低马赫数普遍存在的起动问题,采用等激波强度法设计了超燃冲压发动机二维混压式前体/进气道,给出了前体/进气道的几何尺寸,对所设计的进气道在设计状态、非设计状态的性能与流场进行了数值模拟,对低马赫数下进气道的起动问题进行了研究。研究表明:设计的进气道附加阻力较小,总压恢复系数较高,在低马赫数下通过附面层抽吸可以满足起动要求,抽吸位置对进气道的起动性能影响很大,靠近回流区前侧抽吸最具有效果。
In order to investigate the ubiquitous starting problem of superhighway Lu gas inlet at low Mach number, the two-dimensional mixed-pressure precursor / inlet of scramjet engine was designed by the equivalent shock intensity method. The precursor / The geometrical dimensions of the tunnel are numerically simulated in the design state and the non-design state of the inlet port. The starting problems of the intake port at low Mach number are studied. The results show that the designed inlet has smaller additional resistance and higher total pressure recovery coefficient, which can meet the starting requirements through suction at low Mach number. The suction position has a great influence on the starting performance of the inlet duct, Near the front of the recirculation zone, suction has the most effect.