An experimental investigation into the pressure - leakage relationship of some failed water pipes
An experimental investigation into the pressure - leakage relationship of some failed water pipes
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DOI：
10.2166/aqua.2007.065
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发表时间：
2007-03
影响因子：
4.3
通讯作者：
B. Greyvenstein;JE van Zyl
中科院分区：
文献类型：
--
作者：
B. Greyvenstein;JE van Zyl
本文报道了一项实验研究，进行测量不同类型的泄漏开口（孔，腐蚀孔，纵向和周向裂纹）和管道材料（石棉水泥，低碳钢和uPVC）的泄漏指数。对从约翰内斯堡供水系统中取出的一些故障管道以及一些人为造成泄漏的管道进行了测试。研究结果证实，泄漏指数可以显著高于理论值0.5。虽然圆孔的泄漏指数接近0.5，但腐蚀孔的值在0.67和2.30之间变化，纵向裂纹在0.79和1.85之间，周向裂纹在0.41和0.52之间。结果表明，腐蚀钢管的泄漏指数最高，在一定条件下，泄漏指数可小于0.5。
This paper reports on an experimental study that was conducted to measure the leakage exponents of different types of leak openings (holes, corrosion holes, and longitudinal and circumferential cracks) and pipe materials (asbestos cement, mild steel and uPVC). A number of failed pipes taken from the Johannesburg water distribution system were tested, as well as a number of pipes with artificially induced leaks. The results of the study confirmed that leakage exponents can be significantly higher than the theoretical value of 0.5. While leakage exponents for round holes were close to 0.5, the values for corrosion holes varied between 0.67 and 2.30, for longitudinal cracks between 0.79 and 1.85, and for circumferential cracks between 0.41 and 0.52. Conclusions include that the highest leakage exponents were found in corroded steel pipes and that under certain circumstances, leakage exponents can be less than 0.5.