摘要
该文基于声类比法,通过求解FW-H方程,对不同喷口与谐振腔位置关系的Hartmann哨的声场分布进行了分析,计算了不同位置关系的Hartmann哨的声指向性。得到了以下结论:喷口与谐振腔位置关系对Hartmann哨的发声基频几乎不产生影响。对称位置关系的Hartmann哨的声场呈对称趋势,且在垂直于喷流方向上达到最大;非对称位置关系的Hartmann哨不再呈现对称趋势。Hartmann哨的最大声压级随着偏离对称位置的距离的增加有小幅增加,最大声压级出现的方向向着谐振腔方向移动。
Based on acoustic analogy method, by solving FWH equation, for different nozzles and the location of cavity Hartmann whistle sound field distributions are analyzed, and the relationship between the different positions of Hartmann whistle sound directivity is calculated. The results show that the relationship between the nozzles and the cavity has almost no effect on the fundamental frequency of the Hartmann whistle. The Hartmann whistle sound field in a symmetrical position shows a symmetrical trend and reaches the maximum in the direction perpendicular to the jet. Hartmann sentinels with asymmetric position relationships are no longer symmetrical. The loudest pressure of the Hartmann whistle increases slightly as the distance from the symmetrical position increases, and the loudest level appears to move in the direction of the resonator.
出处
《应用声学》
CSCD
北大核心
2018年第1期180-186,共7页
Journal of Applied Acoustics
基金
国家自然科学基金项目(11674093
11474091)
河北省自然科学基金项目(A2015502077)
中央高校基本科研业务费专项资金资助(2017XS138)
关键词
Hartmann哨
声类比法
声指向性
Hartmann whistle
The acoustic analogy method
Acoustic characteristics
