摘要
考虑到电站汽轮机噪声的可利用性,利用亥姆霍兹共鸣器和声电转换装置,结合声学理论研究方法对电站汽轮机声场特性进行研究。利用亥姆霍兹共鸣器对声波的放大作用,将电磁式换能器置于亥姆霍兹共鸣器刚性壁板上,使放大的声波能够通过换能器将声能转换成电能,转换的电能通过一个放大稳流电路为负载供电。基于电站汽轮机的声场特性,引进穿孔板作为亥姆霍兹共鸣器矩阵,研究其声质量、声阻抗、声顺等参数;并将电学、力学电路耦合到声学电路进行简化;最后得出了负载两端的电压功率响应曲线,并以此判断声电转换是可以实现的。
Considering the availability of power station steam turbine noise, this paper will study on the acoustic field characteristics of power station steam turbine by using the Helmholtz resonator and electrical switching device and combining with the acoustical theory research method. Using the Helmholtz resonator for acoustic amplification effect, through the electromagnetic transducer placed on the rigid wall of the Helmholtz resonator, the amplified sound waves convert from acoustic energy into electrical energy. The conversion electrical energy supply power for the load through an amplified steady flow circuit. Based on the acoustic properties of the power station steam turbine, perforated plate as a Helmholtz resonator array was introduced, of which the acoustic parameters such as acoustic mass, damping loss and acoustic compliance and so on are studied. The electrical circuitry and mechanical circuitry were coupled to the acoustic circuitry for simplification. Finally, the voltage power response curve is obtained at the two ends of the load. Thus, it is concluded that the acousto electric conversion is achievable.
出处
《压电与声光》
CSCD
北大核心
2014年第6期925-928,共4页
Piezoelectrics & Acoustooptics
关键词
亥姆霍兹
共鸣器
汽轮机
声电转换
噪声
Helmholtz
resonator
steam turbine
acoustoelectric conversion
noise