固体火箭发动机喷管阻尼数值计算方法及规律研究

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振动与冲击 ›› 2022, Vol. 41 ›› Issue (3) : 231-237.

论文

赵天泉1，张翔宇1，甘晓松2

作者信息 +

Numerical calculation method and laws for nozzle damping of solid rocket motor

ZHAO Tianquan1, ZHANG Xiangyu1, GAN Xiaosong2

Author information +

文章历史 +

摘要

从声学角度出发，参考稳态波衰减法，综合考虑喷管辐射损失及对流损失，建立固体火箭发动机喷管阻尼声能共振数值计算方法，通过与阻抗管法测量的试验结果对比验证仿真方法，并探究喷管喉径、监测点位置、声源强度及平均压力对喷管阻尼的影响，结果表明：数值计算结果与试验结果吻合较好，表明本文建立的仿真方法有效；喷管阻尼随喉径的增大而增大，进而使声腔内形成稳定驻波时的压力振幅降低。传声特性分析结果表明，喷管喉径增大，声功率透射系数提高，使喷管阻尼增加；监测点位置及声源强度不会影响喷管阻尼大小，但会影响压力振幅大小；喷管阻尼及压力振幅均与平均压力大小无关。

Abstract

From the perspective of acoustics, referring to the steady-state wave attenuation method, comprehensively considering the nozzle radiation loss and convection loss, the acoustic energy resonance numerical calculation method for solid rocket motor nozzle damping is established, and the simulation method is verified by comparing with the test results measuring by impedance tube method. The influence of nozzle throat diameter, monitoring point location, sound source intensity and average pressure on nozzle damping is explored. The results show that the numerical results are in good agreement with the experimental results, which shows that the simulation method established in this paper is effective; The damping of nozzle increases with the increase of throat diameter, which reduces the pressure amplitude when the steady standing wave is formed in the cavity. The analysis results of the sound transmission characteristics show that the nozzle throat diameter increases, the sound power transmission coefficient increases, and the nozzle damping increases; The position of the monitoring point and the intensity of the sound source have no effect on the nozzle damping, but affect the pressure amplitude; Both damping and pressure amplitude have nothing to do with the average pressure.

导出引用

赵天泉1，张翔宇1，甘晓松2. 固体火箭发动机喷管阻尼数值计算方法及规律研究[J]. 振动与冲击, 2022, 41(3): 231-237

ZHAO Tianquan1, ZHANG Xiangyu1, GAN Xiaosong2. Numerical calculation method and laws for nozzle damping of solid rocket motor[J]. Journal of Vibration and Shock, 2022, 41(3): 231-237

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