Siphon Break Phenomena Associated With Pipe Leakage Location
Siphon Break Phenomena Associated With Pipe Leakage Location
复制标题
与管道泄漏位置相关的虹吸破裂现象
DOI：
10.1115/1.4054654
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发表时间：
2022
期刊：
影响因子：
--
通讯作者：
Leon, Arturo S.
中科院分区：
文献类型：
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作者：
Zanje, Sumit R.;Bian, Linlong;Verma, Vivek;Yin, Zeda;Leon, Arturo S.
本文研究了虹吸管破裂现象与管道泄漏位置的关系。本研究分为两个部分：（1）建立了一个非定常三维（3D）计算流体动力学（CFD）模型，在无泄漏条件下使用流体体积（VOF）技术模拟模拟虹吸管中的压头（水位）和流量;（2）使用第一部分中建立的模型，我们研究了与管道泄漏位置相关的虹吸管破裂现象。在无渗漏条件下，模拟虹吸管的瞬态水位和流量计算结果与试验测量结果吻合较好。此外，还对虹吸管内的速度场、压力场和相含量进行了深入分析。所提出的方法和研究结果表明，高于水力坡度线和接近虹吸管顶部倒U形截面的泄漏最终导致虹吸管断裂，而低于水力坡度线的泄漏则不是这种情况。当渗漏在水力坡降线以上，且渗漏位置远离虹吸管上部水平段时，吸入的空气随虹吸水排出，不会立即导致虹吸管破裂，从而使虹吸管完全破裂的时间延长。
This work investigates the siphon break phenomenon associated with pipe leakage location. The present study is divided into two parts: (1) an unsteady three-dimensional (3D) computational fluid dynamics (CFD) model is developed to simulate the pressure head (water level) and discharge in the simulated siphon using the volume-of-fluid (VOF) technique under no-leakage condition and (2) using the model developed in the first part we investigated the siphon break phenomenon associated with pipe leakage location. The calculated results of transient water level and discharge rate at the simulated siphon for the no-leakage condition were in good agreement with the experimental measurements. In addition, the velocity, pressure fields, and phase fractions in the siphon pipe were analyzed in depth. The methodology and findings presented show that leakage above the hydraulic grade line and close to the top inverted U section of the siphon pipe ultimately leads to the siphon breakage, which is not the case for a leakage below the hydraulic grade line. It is also concluded that if leakage is above the hydraulic grade line and the leakage position is far away from the upper horizontal section of the siphon pipe, it may not lead to the immediate siphon breakage as ingested air gets removed with siphoning water, allowing it further time to cause complete siphon breakage.