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SETSCI - Volume (2018)
ISAS 2018 - Ist International Symposium on Innovative Approaches in Scientific Studies, Kemer-Antalya, Turkey, Apr 11, 2018

Numerical Simulation of A Cavitating Centrifugal Pump (ISAS 2018_265)
Aydın Hacı Dönmez1*, Zehra Yumurtacı2, Levent Kavurmacıoğlu3
1Mechanical Engineering Department, Yildiz Technical University, İstanbul, Turkey
2Yildiz Technical University , İstanbul, Turkey
3İstanbul Technical University , İstanbul, Turkey
* Corresponding author: adonmez@yildiz.edu.tr
Published Date: 2018-06-23   |   Page (s): 417-721   |    59     4

ABSTRACT Current study is related with numerical simulation of a centrifugal pump impeller with the specific speed of nq=13. By the help of computational fluid dynamics (CFD) at different operating points, pump performance rsults (Head-Discharge graph) are obtained. Simulations were in good agreement with experimental results. Afterwards, two phase CFD study is carried out in order to examine the cavitation performance of the pump. According to the numerical cavitation tests conducted in selected flow rates by decreasing the inlet pressure gradually; required net positive suction (NPSHR) curve of the pump is obtained. During meshing procedure, single blade passage is considered and tetrahedrons are used. On the other hand, while meshing the
vaneless diffuser, hexahedron elements are used. Finer grids are adopted on solid surfaces for a detailed flow observation. Shear Stress Transport (SST) turbulence model is used throughout the study and Rayleigh-Plesset cavitation model is applied in two phase simulations.  
KEYWORDS Centrifugal pump, impeller, cavitation, CFD, turbulence, two phase
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