Experimental Study on Flow Behavior of Unshrouded Impeller Centrifugal Pumps under Inlet Air Entrainment Condition

International Journal of Turbomachinery, Propulsion and Power

卷:6

Zhonghai Liu¹  Meng Fan²  Gérard Bois²  Peng Wang³  Minquan Liao³  Qiaorui Si³  Qianglei Cui³  Shouqi Yuan³ 

[1] Changsha Dewater Machanical Technology Co., Ltd., Changsha 410100, China;

[2] LMFL, FRE CNRS 3723, Arts et Métiers Paris Tech, 59046 Lille, France;

[3] National Research Center of Pumps, Jiangsu University, Zhenjiang 212013, China;

关键词: centrifugal pump;    two-phase flow pattern;    pressure pulsation;    visualization;   

DOI  :  10.3390/ijtpp6030031

来源: DOAJ

【 摘 要 】

Results on overall pump head and efficiency performance, pressure pulsation and high speed camera visualization of flow patterns behavior are presented for different inlet air-water void fractions at a given rotational speed. With the increase of inlet void fractions and decrease of the flow rates, the size of bubbles increase and tend to agglomerate in specific impeller passage locations along the blade chord. The starting point of pump breakdown is related to a strong inward reverse flow occurring in a specific location near the shroud gap of the impeller and volute tongue region. Using a constant air void fraction value of 2%, pressure pulsation frequency results are analyzed in relation with local flow mixture patterns and flow rate modification.

【 授权许可】

Unknown