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采用有限体积法预估喷水对火箭燃气射流气动噪声的抑制程度.建立并求解了守恒的控制体的质量、动量和能量方程,得到了燃气和水掺混后的等效射流参数,分析了水和燃气的质量流率比对等效射流参数和降噪效果的影响.计算结果和试验数据的结果基本吻合.结果显示,当水和燃气的质量流率比超过一个临界值之后,降噪效率会降低.
The finite volume method was used to predict the degree of suppression of aerodynamic noise of rocket gas jet by water jet.The mass, momentum and energy equations of the controlled body were established and solved, and the equivalent jet parameters of gas and water were obtained. Water and gas mass flow rate of the equivalent jet parameters and noise reduction effect.The results of the calculation and the experimental data are basically consistent.The results show that when the mass flow rate ratio of water and gas exceeds a critical value, Efficiency will be reduced.