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实际声强测量大多是在流动环境条件下进行,因此湍流对声强测量的影响是人们十分关心的工程实用问题。文章结合声强和湍流边界层等相关领域的技术,对流动条件下的声强技术进行了研究分析,导出了由湍流边界层引起的声强的具体表达式。应用Corcos建立的湍流边界层脉动压力模型,对湍流边界层脉动压力诱导的声强进行了数值计算分析,分析了测量传感器间距、马赫数等对声强测量的影响。
Most of the actual sound intensity measurements are made under flowing environmental conditions, so the influence of turbulence on the sound intensity measurement is a practical engineering problem that people are very concerned about. In this paper, the sound intensity technology under flowing conditions is studied and analyzed in combination with the related technologies such as sound intensity and turbulent boundary layer, and the specific expression of the sound intensity caused by the turbulent boundary layer is derived. The turbulent boundary layer pulsation pressure model established by Corcos was used to numerically calculate the sound pressure induced by the fluctuating pressure in the turbulent boundary layer. The influence of the sensor spacing, the Mach number and so on on the sound intensity measurement was analyzed.