TY - JOUR
T1 - Experimental analysis of diffuser rotating stall in a three-stage centrifugal pump
AU - Takamine, Taiki
AU - Furukawa, Daichi
AU - Watanabe, Satoshi
AU - Watanabe, Hiroyoshi
AU - Miyagawa, Kazuyoshi
N1 - Funding Information:
This study has been carried out under the HPC (High Performance Computing) Research Committee of Turbomachinery Society of Japan (TSJ), which was established in 2015, following the preceding three-years project, “HPC Project (2011-2014)" organized by TSJ. The committee and the project have aimed at examining the effectiveness/validity of high performance computing of very large scale problems in the field of turbomachinery. The committee and the project consist of six working groups (WGs). This study has been carried out to provide the experimental data for the validation of HPC simulation in WG2: Unsteady simulation of multi-stage centrifugal pump. The authors would like to express sincere gratitude to the members of WG2 for giving us the opportunity to take part in the experiment as well as for fruitful discussions throughout WG2 meetings. The hydraulic design of the test pump was made by Miyagawa Lab. of Waseda University, Japan, and the staffs/students involved are highly appreciated for their contributions. Finally, we would like to thank to TSJ for the organization of this project and committee and to DMW Corporation, Ebara Corporation, Hitachi, Ltd., Mitsubishi Heavy Industries, Ltd. and Shin Nippon Machinery Co. Ltd. for their financial supports.
Publisher Copyright:
© 2018, Turbomachinery Society of Japan. All rights reserved.
PY - 2018/1/1
Y1 - 2018/1/1
N2 - Rotating stall phenomenon limits the operation range of turbomacnines, therefore it is important to understand the crucial parameters of this phenomenon. In the present study, the diffuser rotating stall in a three-stage centrifugal pump was experimentally studied. Examined main parameter was an axial offset of rotor against the stationary part, which might be unavoidable due to accumulation of geometrical tolerances and assembling errors. The effect of leakage flow rate at the balance drum section employed as a thrust balancing device, which increases the thru-flow rate at the first and second stages diffusers. was also studied. The effect of rotor axial offset was clearly observed and, with the rotor axial offset to the suction side, the rotating stall appeared only at the third stage diffuser. By setting the balance flow rate set to zero, the onset range of rotating stall became wider m the first and second stage diffusers, which was well explained by the decrease of the thru-flow rate.
AB - Rotating stall phenomenon limits the operation range of turbomacnines, therefore it is important to understand the crucial parameters of this phenomenon. In the present study, the diffuser rotating stall in a three-stage centrifugal pump was experimentally studied. Examined main parameter was an axial offset of rotor against the stationary part, which might be unavoidable due to accumulation of geometrical tolerances and assembling errors. The effect of leakage flow rate at the balance drum section employed as a thrust balancing device, which increases the thru-flow rate at the first and second stages diffusers. was also studied. The effect of rotor axial offset was clearly observed and, with the rotor axial offset to the suction side, the rotating stall appeared only at the third stage diffuser. By setting the balance flow rate set to zero, the onset range of rotating stall became wider m the first and second stage diffusers, which was well explained by the decrease of the thru-flow rate.
KW - Multi-stage centrifugal pump
KW - Rotating stall
KW - Rotor axial offset
KW - Static pressure fluctuation
KW - Vaned diffuser
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U2 - 10.5293/IJFMS.2018.11.1.077
DO - 10.5293/IJFMS.2018.11.1.077
M3 - Article
AN - SCOPUS:85042660515
SN - 1882-9554
VL - 11
SP - 77
EP - 84
JO - International Journal of Fluid Machinery and Systems
JF - International Journal of Fluid Machinery and Systems
IS - 1
ER -