负压波衰减系数及普通弯管泄漏检测研究

负压波在管道中的传播是能量传播的一种形式,因而在管道传播过程中会有能量的损失,这种损失在经过弯管时损耗会更大.发生泄漏后,管道中间若有弯头,负压波在这一段会有反射、折射现象发生,使负压波的能量减小.文中从实验出发,研究弯头处的负压波传播规律,对负压波衰减系数的影响因素进行研究,得出管道泄漏计算时的弯头当量长度计算公式,并将此分析结果与以前的工作进行对比,验证了此结果的合理性.

Research on Negative Pressure Wave Attenuation Coefficient and Bending Pipeline Leakage Detection

Negative pressure wave spread is a special form of energy spread, while spreading in the pipeline it could cause energy losses, such losses will be greater if the wave goes through a bending pipeline. If there is leakage in the pipeline including an elbow, negative pressure wave will generate reflection, refraction phenomenon which decrease the energy loss. This paper is based on the experience, then studies the spreading law of negative pressure wave and the factors of the negative pressure wave attenu- ation coefficient. Finally, it obtains the calculation formula for equivalent length of elbow, then compares the result with the previous study, it could verify the result in this paper reasonable.