摘要
介绍了回转体流噪声实验的方法,并对实验测得的回转体流噪声声功率谱的谱特性进行了分析。测量结果表明:在高频段,回转体流噪声声功率谱按6dB/ 倍频程衰减;且其声功率谱与流速的7 次方成正比。基于本实验。
The present study includes experimental measurement of flow noise of an axisymmetric headform. The results of experimental investigations clearly show that the spectral levels roll off at 6 dB/oct; and at high frequency, the flow noise scales on veloci ty to approximately the 7 power. And the scaling law developed by Li is supported by the experiment.
出处
《流体力学实验与测量》
CSCD
1999年第4期14-18,共5页
Experiments and Measurements in Fluid Mechanics
基金
中船总基金
