naa a22 4500 510765599 CHVBK 20180411083155.0 cr unu---uuuuu 180411e20130201xx s 000 0 eng 10.1007/s11630-013-0584-3 doi (NATIONALLICENCE)springer-10.1007/s11630-013-0584-3 Experimental study on a centrifugal pump with an open impeller during startup period [Elektronische Daten] [Yuliang Zhang, Zuchao Zhu, Yingzi Jin, Baoling Cui, Yi Li, Huashu Dou] Transient performance of fluid machinery during transient operating periods, such as startup and stopping, has been drawn more attentions recently due to the growing engineering needs. In this paper, the transient behavior of a prototype centrifugal pump with an open impeller during rapid startup period is studied experimentally. The variations of the rotational speed, flow rate, head, and shaft power during rapid startup period are recorded in experiments at different discharge valve openings. In addition, the non-dimensional flow rate and head are also used to analyze the transient behavior. The research result shows that the rise characteristic of the rotational speed is not basically changed by working points, while mainly depends on the startup characteristics of the driving motor. Compared with the rapid rise of the rotational speed, the flow rate rises slowly in the initial stage of startup. Moreover, the flow rate lags behind the rotational speed to rise to final stable value, and the delay becomes more severe with the increase of the discharge valve opening. The shaft power impact phenomenon generally exists in the process of startup. The non-dimensional analysis shows that the non-dimensional head is very high at the very beginning of startup, and quickly falls to the minimum, then gradually rises to final stable value, while the non-dimensional flow rate always shows the rise tendency during whole startup period. In conclusion, it is found from the non-dimensional results that the quasi-steady analysis is unable to accurately assess the transient flow during startup period. Science Press, Institute of Engineering Thermophysics, CAS and Springer-Verlag Berlin Heidelberg, 2013 centrifugal pump nationallicence open impeller nationallicence startup nationallicence experimental study nationallicence transient behavior nationallicence Zhang Yuliang The State Key Lab of Fluid Power Transmission and Control, Zhejiang University, Hangzhou, China aut Zhu Zuchao The State Key Lab of Fluid Power Transmission and Control, Zhejiang University, Hangzhou, China aut Jin Yingzi The Province Key Lab of Fluid Transmission Technology, Zhejiang Sci-Tech University, Hangzhou, China aut Cui Baoling The Province Key Lab of Fluid Transmission Technology, Zhejiang Sci-Tech University, Hangzhou, China aut Li Yi The Province Key Lab of Fluid Transmission Technology, Zhejiang Sci-Tech University, Hangzhou, China aut Dou Huashu The Province Key Lab of Fluid Transmission Technology, Zhejiang Sci-Tech University, Hangzhou, China aut Journal of Thermal Science SP Science Press 22/1(2013-02-01), 1-6 1003-2169 22:1<1 2013 22 11630 https://doi.org/10.1007/s11630-013-0584-3 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s11630-013-0584-3 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Zhang Yuliang The State Key Lab of Fluid Power Transmission and Control, Zhejiang University, Hangzhou, China aut NATIONALLICENCE 700 1- Zhu Zuchao The State Key Lab of Fluid Power Transmission and Control, Zhejiang University, Hangzhou, China aut NATIONALLICENCE 700 1- Jin Yingzi The Province Key Lab of Fluid Transmission Technology, Zhejiang Sci-Tech University, Hangzhou, China aut NATIONALLICENCE 700 1- Cui Baoling The Province Key Lab of Fluid Transmission Technology, Zhejiang Sci-Tech University, Hangzhou, China aut NATIONALLICENCE 700 1- Li Yi The Province Key Lab of Fluid Transmission Technology, Zhejiang Sci-Tech University, Hangzhou, China aut NATIONALLICENCE 700 1- Dou Huashu The Province Key Lab of Fluid Transmission Technology, Zhejiang Sci-Tech University, Hangzhou, China aut NATIONALLICENCE 773 0- Journal of Thermal Science SP Science Press 22/1(2013-02-01), 1-6 1003-2169 22:1<1 2013 22 11630 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer