摘要 The instantaneous variations of the hydraulic characteristics take place in centrifugal pumps during their startup, shutdown and other variable speed operations. In this paper, the variable speed method was proposed to simulate the transient internal flow field and the external performance of the pump during starting and stopping periods. [JP2]The terms of accelerations due to variable speeds in the flow governing equations were analyzed[JP] in a multiple reference of frame (MRF). A transient CFD simulation was performed for a typical centrifugal pump by using ANSYSCFX with the standard kε turbulence model.[JP2]The entire simulation process was composed of four stages: startup, normal run, shutdown and postshutdown. The function of rotating speed with regard to time was set by CEL language directly into the impeller domain in the preprocessor of the software to conduct variable speed simulation. The variations of the flow field in the centrifugal pump were obtained from the transient simulation. The change laws of flow rate, head and other performance parameters over time were also analyzed and summarized.
通讯作者:
Zhang Jie(1990—), male, M.S. (726873299@qq.com), researching in: Theory and application on fluid machinery.
作者简介: HUANG Si(1962—), male, Professor (huangsi@scut.edu.cn), researching in: Theory and application on fluid machinery.
引用本文:
HUANG Si, ZHANG Jie, ZHANG Xuejiao, SU Xianghui. Numerical simulation of transient flow performance during different periods in centrifugal pump[J]. 排灌机械工程学报, 2016, 34(9): 737-741.
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