Pressure Fluctuation Characteristics Analysis of Centrifugal Pump as Turbine in Its Start-Up Process

doi:10.3390/act11050132

	Pressure Fluctuation Characteristics Analysis of Centrifugal Pump as Turbine in Its Start-Up Process
	Chai, Baodui 1,2; Yang, Junhu 1; Wang, Xiaohui 1; Jiang, Bingxiao 1
刊名	ACTUATORS
	2022-05-01
卷号	11 期号:5
关键词	pump as turbine start-up process pressure fluctuation rotating speed head
DOI	10.3390/act11050132
英文摘要	In order to study pressure fluctuation characteristics of a centrifugal pump as turbine (PAT) in its start-up process, Fluent was used to do numerical simulation of the PAT start-up process. Time and frequency domain analyses were performed on the data acquired at different positions and different heads. The results show that a large number of low-pressure areas and strong vortexes are formed within the impeller at the initial time of start-up. With the increase in rotating speed, the vortexes rapidly decrease and are concentrated on the blade non-working face. The pressure fluctuation amplitude is the maximum at the start-up initial instant; with increase in rotating speed, it reduces rapidly at the volute spiral part. The pressure fluctuation number within one impeller rotation cycle is consistent with blade number, and the dominant frequency of pressure fluctuation is 6 times the impeller rotational frequency. The dominant frequency amplitude of radial pressure fluctuation increases with decrease in radial size in the volute. The pressure fluctuation in the impeller is much more intensive than that in the volute, and its maximum dominant frequency amplitude occurs in the middle of the impeller towards the inner edge. With the increase in head, the number of pressure fluctuation and the amplitude of dominant frequency increase at the same time during the start-up process.
WOS研究方向	Engineering ; Instruments & Instrumentation
语种	英语
出版者	MDPI
WOS记录号	WOS:000803512100001
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/158668]
专题	能源与动力工程学院
作者单位	1.Lanzhou Univ Technol, Sch Energy & Power Engn, Lanzhou 730050, Peoples R China; 2.Lanzhou Jiaotong Univ, Sch Chem & Chem Engn, Lanzhou 730070, Peoples R China
推荐引用方式 GB/T 7714	Chai, Baodui,Yang, Junhu,Wang, Xiaohui,et al. Pressure Fluctuation Characteristics Analysis of Centrifugal Pump as Turbine in Its Start-Up Process[J]. ACTUATORS,2022,11(5).
APA	Chai, Baodui,Yang, Junhu,Wang, Xiaohui,&Jiang, Bingxiao.(2022).Pressure Fluctuation Characteristics Analysis of Centrifugal Pump as Turbine in Its Start-Up Process.ACTUATORS,11(5).
MLA	Chai, Baodui,et al."Pressure Fluctuation Characteristics Analysis of Centrifugal Pump as Turbine in Its Start-Up Process".ACTUATORS 11.5(2022).