Numerical and Experimental Investigation of Flow Characteristics in a Fluid Self-Lubricating Centrifugal Pump with R134a Refrigerant

被引:4
作者
Fang, Xufeng [1 ]
Zhang, Beile [1 ]
Lin, Xinyi [1 ]
Zhou, Hong [1 ]
Chen, Shuangtao [1 ,2 ]
Hou, Yu [1 ,2 ]
Xue, Rong [1 ,2 ]
Zhang, Ze [1 ]
机构
[1] Xi An Jiao Tong Univ, Sch Energy & Power Engn, Xian 710049, Peoples R China
[2] Xi An Jiao Tong Univ, MOE Key Lab Cryogen Technol & Equipment, Xian 710049, Peoples R China
来源
APPLIED SCIENCES-BASEL | 2023年 / 13卷 / 14期
基金
中国博士后科学基金;
关键词
refrigerant centrifugal pump; fluid self-lubricating; cavitating flow; inducer; thermal effect; CAVITATING FLOW; PERFORMANCE; IMPELLER;
D O I
10.3390/app13148062
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
With the rapid development of information technology, researchers have paid attention to the pump-driven two-phase cooling loop technology for data centers, which imposes requirements on the efficiency and size of the pump. A fluid self-lubricating centrifugal pump with R134a refrigerant was developed to reach a higher rotation speed and oil-free system, resulting in a more diminutive size. Due to the high rotation speed and refrigerant pressure approaching saturated vapor pressure, the internal flow characteristics and cavitating characteristics are critical and complex. This paper focuses on the prototype's head and cavitation performance based on experimental and numerical data. The experiments indicated that the head coefficient of the pump under design conditions is 0.9881, and the pump's critical cavitation number and breakdown number are 0.551 and 0.412, respectively. The numerical results can predict the head and cavitation with deviations less than 2.6%. To study changing patterns in flow characteristics under the different operating conditions in the refrigerant centrifugal pump, the numerical model based on a modified Sauer-Schnerr cavitation model was built to analyze the distributions of pressure, temperature, relative velocity, and bubble volume across every hydraulic component and different degrees of cavitation, and proposed the influence of the thermal effect on refrigerant cavitating. The cavitating flow characteristics were obtained with the aim of providing guidance for the hydraulic design of a refrigerant centrifugal pump.
引用
收藏
页数:20
相关论文
共 39 条
[1]   CAVITATION IN FLUID MACHINERY AND HYDRAULIC STRUCTURES [J].
ARNDT, REA .
ANNUAL REVIEW OF FLUID MECHANICS, 1981, 13 :273-328
[2]   Numerical and experimental comparison of the vaned diffuser interaction inside the impeller velocity field of a centrifugal pump [J].
Atif, Abdelmadjid ;
Benmansour, Saad ;
Bois, Gerard ;
Dupont, Patrick .
SCIENCE CHINA-TECHNOLOGICAL SCIENCES, 2011, 54 (02) :286-294
[3]   Numerical Study of Pressure Fluctuation and Unsteady Flow in a Centrifugal Pump [J].
Bai, Ling ;
Zhou, Ling ;
Han, Chen ;
Zhu, Yong ;
Shi, Weidong .
PROCESSES, 2019, 7 (06)
[4]   Thermal effects on cavitation instabilities in helical inducers [J].
Cervone, A ;
Testat, R ;
Bramanti, CL ;
Rapposello, E ;
d'Agostino, L .
JOURNAL OF PROPULSION AND POWER, 2005, 21 (05) :893-899
[5]   Towards the concept of hydrodynamic cavitation control [J].
Chatterjee, D ;
Arakeri, VH .
JOURNAL OF FLUID MECHANICS, 1997, 332 :377-394
[6]   Flow boiling heat transfer mechanisms and flow characteristics of pump-driven two-phase flow systems used in data center cooling br [J].
Chen, Xiaoxuan ;
Ding, Tao ;
Cao, Hanwen ;
Ding, Hongqing ;
Li, Zhen .
APPLIED THERMAL ENGINEERING, 2023, 220
[7]   Numerical Simulation of Unsteady Cavitation Flow in a Low-Specific-Speed Centrifugal Pump with an Inducer [J].
Cui, Baoling ;
Han, Xiaotian ;
An, Yinchu .
JOURNAL OF MARINE SCIENCE AND ENGINEERING, 2022, 10 (05)
[8]   Experimental Study of a Cavitating Centrifugal Pump During Fast Startups [J].
Duplaa, S. ;
Coutier-Delgosha, O. ;
Dazin, A. ;
Roussette, O. ;
Bois, G. ;
Caignaert, G. .
JOURNAL OF FLUIDS ENGINEERING-TRANSACTIONS OF THE ASME, 2010, 132 (02) :0213011-02130112
[9]   Study on a high-speed oil-free pump with fluid hydrodynamic lubrication [J].
Fang, Xufeng ;
Hou, Yu ;
Cai, Yijie ;
Chen, Liang ;
Lai, Tianwei ;
Chen, Shuangtao .
ADVANCES IN MECHANICAL ENGINEERING, 2020, 12 (07)
[10]  
Foeth EJ, 2006, EXP FLUIDS, V40, P503, DOI 10.1007/s0034S-005-0082-9