摘要
采用FW-H声模拟法,研究了谐振腔长度、喷流间距、谐振腔直径和入口气压等对哈特曼发声器声学性能的影响。得出如下结论:哈特曼发声器的发声基频大小与谐振腔长度成反比;总声压级随谐振腔长度增大而增大;总声压级随喷流间距变化作震荡变化,且变化周期随着谐振腔直径的增大而增大;谐振腔直径大,产生的声压级也高;入口气压增大,总声压级增大,但对基频的影响不大。该结论对哈特曼发声器的应用具有重要的指导意义。
Based on the method of FW-H acoustic model, the influence of the model parameters on the acoustic characteristics of the Hartmann acoustic generator is studied, these parameters are resonator length, spacing between the jet and resonator tube, the diameter of resonator tube, and the inlet pressure. The conclusions are as foIIows： The total sound pressure level （SPL） increases with the increase of the length of resonator tube, while the magnitude of fundamental frequency is reverse; the total SPL oscillates with the increase of the spacing between jet and resonator, and the oscillating period increases with the increase of the diameter of resonator tube; the Hartmann generator with larger diameter of resonator tube can produce a higher SPL; the total SPL increases with the increase of the inlet pressure, while the fundamental frequency changes slightly. The results of the paper are significant for the application of the Hartmann acoustic generator,
出处
《声学技术》
CSCD
2012年第3期335-339,共5页
Technical Acoustics
基金
国家"863计划"课题(2005AA000200)资助
关键词
哈特曼超声波发生器
FW-H声模拟法
声学特性
Hartmann tfltrasonic generator
the FW-H acoustic model
acoustic characteristics
