Research on Hydraulic Characteristics of Water Leakage Phenomenon of Waterproof Hammer Air Valve in Water Supply Pressure Pipeline Based on Sustainable Utilization of Water Resources in Irrigation Areas

Yixiong Cheng (), Yuan Tang (), Jianhua Wu, Hua Jin, Lixia Shen and Zhiyong Sun
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Yixiong Cheng: College of Water Resources Science and Engineering, Taiyuan University of Technology, Taiyuan 030024, China
Yuan Tang: College of Water Resources Science and Engineering, Taiyuan University of Technology, Taiyuan 030024, China
Jianhua Wu: College of Water Resources Science and Engineering, Taiyuan University of Technology, Taiyuan 030024, China
Hua Jin: College of Water Resources Science and Engineering, Taiyuan University of Technology, Taiyuan 030024, China
Lixia Shen: College of Water Resources Science and Engineering, Taiyuan University of Technology, Taiyuan 030024, China
Zhiyong Sun: Shandong Survey and Design Institute of Water Conservancy Co., Ltd., Qingdao 266109, China

Sustainability, 2024, vol. 16, issue 22, 1-25

Abstract: To investigate the causes of water leakage in the waterproof hammer air valve and its impact on sustainable water resource management, the DN100 waterproof hammer air valve was taken as the research object. By using the overset grid solution method of ANSYS Fluent 2021 R1 software, the flow field simulation of the waterproof hammer air valve was carried out. The transient action during the ascent phase of the key structural component floating ball, and the velocity and pressure distribution of the flow field inside the air valve are analyzed. The results showed that by giving different inlet flow velocities, the normal flow velocity range for the floating ball to float up was below 35 m/s and above 50 m/s. When the inlet flow velocity was between 35 m/s and 50 m/s, the growth rate of the pressure difference above and below the floating ball increased from 1.48% to 5.79% and then decreased to 0.4%. The floating ball would not be able to float up due to excessive outlet pressure above, which would cause the DN100 waterproof hammer air valve to leak water and fail to provide water hammer protection. When the inlet flow rate is 5 m/s, the velocity and pressure inside the valve body increase with time during the upward movement of the floating ball inside the waterproof hammer air valve and tend to stabilize at 400 ms. Through the generated pressure and velocity cloud maps, it can be observed that the location of maximum pressure is at the bottom of the buoy, directly below the floating ball, and at the narrow channels on both sides of the outflow domain. The location of the maximum velocity is at the small inlet of the bottom of the buoy. When the inlet speed of the valve is constant, a large amount of water flow is blocked by the floating ball, reducing the flow velocity and forming partial backflow below the floating ball, with an obvious vortex phenomenon. A small portion of the water flow passes through the air valve at a high velocity from both ends of the channel, and the water flow below the floating ball is in an extremely unstable state under the impact of high-speed water flow, resulting in a large gradient of water flow velocity passing through the valve. The research results not only help to improve the operational efficiency of water resource management systems but also reduce unnecessary water resource waste, thereby supporting the goal of sustainable water resource management.

Keywords: waterproof hammer air valve; CFD; overset grid; hydraulic characteristics; numerical simulation; sustainable water resource management (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2024
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