Abstract This paper is concerned with a theoretical and experimental investigation into the pressure spectrum in a pressurised fluid-filled pipe containing a leak. A general theoretical framework for predicting the leak noise spectrum is derived. A simple relationship is developed between the leak noise pressure spectrum in the pipe and the velocity spectrum at the leak orifice. Measurements of the leak noise spectrum are also presented from a pipe rig with air under pressure. The variation in noise spectrum is investigated for various leak orifice diameters and pipe pressures and compared against predictions from the theoretical model. The model is shown to predict the general shape of the pressure spectrum when the turbulence quantities are appropriately chosen. The variation in overall noise with leak orifice radius and exit velocity is also well-captured by the theoretical model.

中文翻译：

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天然气管道系统中的泄漏噪声谱：理论和实验研究

摘要 本文涉及对包含泄漏的加压流体填充管道中的压力谱进行理论和实验研究。推导出用于预测泄漏噪声谱的一般理论框架。在管道中的泄漏噪声压力谱和泄漏孔口处的速度谱之间建立了一个简单的关系。泄漏噪声频谱的测量也来自带有压力空气的管道钻机。研究了各种泄漏孔口直径和管道压力下噪声频谱的变化，并将其与理论模型的预测进行了比较。The model is shown to predict the general shape of the pressure spectrum when the turbulence quantities are appropriately chosen.