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中文摘要：
设计搭建了太阳能热声发动机实验系统，它由双轴全自动跟踪菲涅尔透镜聚焦型集热器和小型化驻波热声发动机两大组件构成。分别对充注不同压力N2、He、Ar三种工质的太阳能热声发动机的起振温度、起振时热声核温度分布、压力振幅进行了实验研究。结果表明，氮气、氦气和氩气在相同充气压力下，He起振温度最高，N2起振温度最低；N2在充气压力1．0MPa时达到最低起振温度394．8℃，且其压力振幅对充气压力变化不敏感；Ar在充气压力1．0MPa时达到最低起振温度418．2℃，且其压力振幅随着充气压力的升高而逐渐增加。实验结果为优化太阳能热声发动机系统的热力性能提供了实验依据。
英文摘要：
In this paper, a experimental system of solar powered thermoacoustic engine has been designed and set up, which consists of two major components（a dual-axis automatic tracking Fresnel lens-focusing collector and a small standing wave thermoacoustic engine）. Filling in different pressure nitrogen, helium and argon gas respectively, onset temperature, onseting temperature distribution of thermoacoustic core and pressure amplitude of solar powered thermoacoustic engine has been studied. The experimental results show that the onset temperature of He is highest and N2 is lowest under the same pressure. When the injection pressure of N2 is 1.0 MPa, the system reaches the lowest onset temperature 394.8℃, and at the same temperature, the pressure amplitude of N2 keeps constant as the injection pressure increasing. When the injection pressure of Ar is 1.0 MPa, the system reaches the lowest onset temperature 418.2℃, and at the same temperature, the pressure amplitude of Ar rises as the injection pressure increasing. These results provide the experimental basis for optimizing thermodynamic performance of the solar powered thermoacoustic engine system.
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