Analysis of Internal Flow in Boiler Water Circulating Pump

2018 4th International Conference on Renewable Energy Technologies

Kai, Tong^1 ; Zizheng, Feng^2 ; Fanyu, Kong^1 ; Xiaohui, Duan^1 ; Kai, Wang^1 ; Tao, Dai^1

National Research Center of Pumps, Jiangsu University, Zhenjiang, China^1

Eleventh Research Institute of the Sixth Academy, CASC, Xi'an, China^2

关键词: Circulating mediums;    High temperature and high pressure;    Hydraulic designs;    Internal flow characteristics;    Low pressure zone;    Outlet pressures;    Pressure increase;    Water circulating pumps;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/168/1/012027/pdf
DOI  :  10.1088/1755-1315/168/1/012027

来源: IOP

【 摘 要 】

As one of the core components of supercritical power station, boiler water circulating pump is a kind of glandless pump in which motor and pump are integrated. The circulating medium in the pump is high temperature and high pressure water. Understanding the internal flow characteristics is helpful to improve the hydraulic design of the pump. The numerical simulation of pressure distribution and streamline in the pump body of boiler water circulating pump were carried out with software ANSYS-CFX under three working conditions (0.6 Q, 1.0 Q and 1.4 Q). The results show that: The pressure near the outer wall of pump body is larger, and gradually decreases to the interior. With the decreases of cross section radius, the number of vortices increases. The vortices gradually decrease with the increase of flow rate, and the flow becomes more and more uniform. The pressure increases from the inlet pipe to the outlet pipe under different flow rates. The inlet and outlet pressure difference is inversely proportional to the flow rate. Under the condition of small flow rate and large flow rate, there are many low pressure zones in the inlet side of the blade.