The annular volute is typically used in a slurry pump to reduce the collisions between solid particles and the volute tongue and to achieve a better resistance to blocking. However, only limited studies regarding annular volutes are available, and there is no systematic design method for annular volutes. In this study, the influence of volute casing cross-sectional flow area on the hydraulic loss, pressure pulsations, and radial force under varying working conditions in a centrifugal ceramic pump are discussed in detail. Experimental tests were conducted to validate the numerical results. The results indicated that, when the volute casing flow area increases, the hydraulic performance decreases marginally under the rated working conditions, but increases at the o-design points, specifically under large flow condition. However, the volute casing with a larger flow area has a wider high-e ciency region. In addition, the increase in the volute casing flow area will decrease the pressure pulsations in the volute, regardless of the working condition, and decrease the radial force on the shaft, therefore, providing an improved pump operational stability. It is anticipated that this study will be of benefit during the design of annular volutes.
Chinese Journal of Mechanical Engineering
Supported by National Natural Science Foundation of China(Grant No.51779107)
Jiangsu Provincial Natural Science Foundation of China(Grant No.BK20170548)
Postdoctoral Science Foundation of China(Grant No.2017M611724)
Priority Academic Program Development of Jiangsu Higher Education Institutions(PAPD).
Correspondence:Yi Tao,firstname.lastname@example.org,Yi Tao,born in 1988,is currently a lecturer at Wuxi Vocational Institute of Arts and Technology,China.He received his PhD degree from National Research Center of Pumps and System Engineering and Technology,Jiangsu University,China.His research interests include solid-liquid two-phase flow and design of slurry pumps;Shouqi Yuan,born in 1963,is currently a professor and a PhD candidate supervisor at National Research Center of Pumps and System Engineering and Technology,Jiangsu University,China.He has received 16 prizes for science and technology advancement at province or ministry level.He has published 3 books and more than 240 papers.His research interests include the theory,design and CFD of pumps and fluid machinery;Jianrui Liu,born in 1952,is currently a professor and a PhD candidate supervisor at National Research Center of Pumps and System Engineering and Technology,Jiangsu University,China.His research interests include fluid machinery engineering;Fan Zhang,born in 1987,is currently a PhD at National Research Center of Pumps and System Engineering and Technology,Jiangsu University,China.His research interests include flow characteristics in fluid machinery