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空气节流通过在流场中产生激波串,有效地辅助燃料实现稳定燃烧。非定常数值模拟研究了空气节流对超燃燃烧室燃料稳定燃烧的影响,分析了节流实现燃料稳定燃烧的机理。结果表明:在燃烧室入口马赫数2、静温548.8K、静压0.1MPa,乙烯燃料当量比为0.5,先锋氢辅助点火的条件下,距离发动机入口845mm处,30%入口空气流量的节流流量有效地实现了燃料的稳定燃烧,激波串是实现燃料稳定燃烧的根本原因,节流参数对节流效果有着较大的影响。
Air throttling creates a steady stream of shock by effectively creating a shock train in the flow field. The unsteady numerical simulation studies the effect of air throttling on the stable combustion of fuel in the super-combustion chamber, and analyzes the mechanism of throttling to achieve stable fuel combustion. The results show that: at the entrance of the combustion chamber, Mach number 2, static temperature 548.8K, static pressure 0.1MPa, ethylene fuel equivalence ratio 0.5, Pioneer hydrogen assisted ignition, throttling 30% of the inlet air flow at 845mm from the engine inlet The flow rate effectively achieves the stable combustion of the fuel. The shock wave train is the fundamental reason for the stable combustion of the fuel. The throttling parameters have a great influence on the throttling effect.