Hydraulic Characteristics and Rectification Optimization of Circulating Water Pump Inlet Duct of Power Plant

doi:10.11930/j.issn.1004-9649.2017.02.064.06

Abstract

Abstract: The advantages and disadvantages of circulating water pump inlet condition have a significant impact on circulating water pump efficiency and whether appear cavitation and vibration. In view of the vibration of the circulating water pump in a 300 MW power plant, the three-dimensional numerical simulation of the flow pattern of the circulating water inlet duct was carried out by using the RNG k-ε turbulence model. The whole flow field, the flow field in the region of the bell mouth and the velocity distribution around the pump body were studies. And the corresponding rectification optimization measures were presented. The results show that the slope gradient of the circulating water inlet duct is sharply, which leads to the uneven flow diffusion and large water surface flow velocity. There is a large vortex in the bottom of the slope and the intake sump. The bell mouth section exists water serious asymmetry phenomenon and appear obvious bias, so the pump inlet conditions are poor. Effective rectification and eliminating vortex measures can be taken to improve the flow pattern and even flow rate, and improve the inlet condition of the pump.

Key words: power plant, circulating water pump, circulating water inlet duct, numerical simulation, flow field, rectification

CLC Number:

TV132

WANG Weishu, CUI Qiang, MIAO Shichang, WU Xiaochuan, ZHANG Bin. Hydraulic Characteristics and Rectification Optimization of Circulating Water Pump Inlet Duct of Power Plant[J]. Electric Power, 2017, 50(2): 64-69.

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URL: https://www.electricpower.com.cn/EN/10.11930/j.issn.1004-9649.2017.02.064.06

https://www.electricpower.com.cn/EN/Y2017/V50/I2/64

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