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基于流体体积函数(Volume of Fluid,VOF)方法对超声速横向气流中射流破碎过程进行数值模拟,通过与国内外实验对比,验证了该方法捕捉液柱轨迹的准确性和模拟气相流场的可靠性。针对基准工况以及不同动压比工况下超声速横向气流中射流破碎过程的计算,结果表明:高频的周期不稳定波在液柱破碎中起主要作用;液体射流与超声速横向来流存在强相互作用,形成弓形激波、分离激波以及激波交错的复杂激波系;当动压比升高时,液柱沿流向破碎点位置几乎无变化,而液柱破碎点位置的穿透深度明显增加。
Based on the fluid volume function (VOF) method, the jet flow fragmentation process in supersonic transverse airflow is numerically simulated. Compared with the experiments at home and abroad, the accuracy of the method to capture the trajectory of the liquid column and the reliability of the simulated gas flow field are verified . The results show that the high frequency periodic unstable wave plays a major role in the breakup of liquid column. For liquid jet and supersonic transverse flow, the jet flow is strong The formation of arcuate shock wave, the separation of shock and shock wave complex shock wave system; when the dynamic pressure ratio increases, the liquid column along the flow point of the crushing point almost no change, and the location of the broken column penetration depth obviously increase.