The high frequency acoustic radiation from the boundary layer of an axisymmetric body

• 来源期刊: 声学学报（英文版）
• 学科: 物理学
• 年，卷（期）: 2001,（2）
• 页码范围: 103-110
• 页数: 8页
• 分类号: O4
• 语种: 英文

摘要

The mechanism of acoustic radiation from the boundary layer of an axisymmetric body is analyzed, and its sound pressure spectrum is predicted. It is shown that the acoustic radiation results from the transition region and the turbulent boundary layer; and that the acoustic radiation from transition region is predominant at low frequencies; while the turbulent boundary layer has the decisive effect on acoustic radiation at high frequencies. The calculated values are in good agreement with the experimental data.