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对驻波型热声发动机压力放大器长度对系统性能的影响进行了模拟计算,根据计算分析得知压力放大器的实际最佳长度应该小于系统1/4波长,并且受热声发动机的加热功率、工作压力和负载大小的影响;在负载的声阻固定的情况下,一定范围内振动频率、加热温度、负载入口声功随着压力放大器长度的增大而增大;压力放大器可以提高负载入口声功和效率。
Based on the calculation and analysis, the actual optimum length of the pressure amplifier should be less than 1/4 wavelength of the system, and the heating power of the heated acoustic engine, the working pressure And the impact of load size; in the case of a fixed acoustic impedance load, a certain range of vibration frequency, heating temperature, the sound pressure at the inlet of the load increases with the length of the pressure amplifier; pressure amplifier can improve the sound input load and effectiveness.