Several proposals were designed to investigate the thrust and mass-lfow performance of the ejector-nozzle, The performance was studied by Numerical method .the results point out that the performance of ejector-nozzle varies with variation of the main nozzle pressure ration and size of the pipe.%设计了多个引射喷管方案对引射喷管的流量和推力特性进行了研究。采用数值模拟手段对这些方案进行了多状态的性能计算，详细总结各方案在不同状态下的性能特点及规律，并从理论角度对引起其变化规律的原因进行了详细分析。研究结果表明外管道出口几何尺寸对引射喷管性能影响规律是随主喷管落压比的不同而不同的。
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