火箭强噪声模拟装置气声功率特性分析?

建立了火箭强噪声模拟装置气声功率特性计算模型。仿真分析了喷喉截面积比、激励信号频率、激励信号幅值、音环质量对火箭强噪声模拟装置气声功率比的影响。仿真结果表明,气动声源气室总压、喷喉截面积比、激励音频信号幅值增大,气动声源激励音频信号频率、音环质量减小,则气声功率比增大。气室总压高的工况比气室总压低的工况气声效率增大幅度要大一些。仿真结果为火箭发动机噪声模拟装置的改进设计提供了理论数据。

The Gas-acoustics Power Characteristic Analysis of Rocket Strong Noise Simulation Device

The simulating model of the gas-acoustics power characteristic of the rocket strong noise simulation device has been created.Effects produced by section ratio between nozzle and throat,the frequency and amplitude of input signal,the sound loop mass on the gas-acoustics power of the rocket strong noise simulation device have been simulated.The analysis results indicate that it will make the gas-acoustics power ratio increase when heightening the total pressure in the gas chamber,the section ratio between nozzle and throat,and the amplitude of input signal,lightening the frequency of input signal and the sound loop mass.And the increasing amplitude under higher total pressure in the gas chamber is greater than that under lower total pressure.Those results will provide theoretic data in improving the design of the rocket strong noise simulation device.