Numerical studies on cavitation behavior in impeller of centrifugal pump with different blade profiles

• Song Pengfei

  Mechanical and Transportation Engineering, China University of Petroleum (Beijing)

• Zhang Yongxue

  Mechanical and Transportation Engineering, China University of Petroleum (Beijing)

• Xu Cong

  Mechanical and Transportation Engineering, China University of Petroleum (Beijing)

• Zhou Xin

  Mechanical and Transportation Engineering, China University of Petroleum (Beijing)

• Zhang Jinya

  Mechanical and Transportation Engineering, China University of Petroleum (Beijing)

抄録

To investigate the influence of blade profiles on cavitation behavior in impeller of centrifugal pump, a centrifugal pump with five different blade profiles impellers are studied numerically. The impellers with five different blade profiles (single arc, double arcs, triple arcs, logarithmic spiral and linear -variable angle spiral) were designed by the in-house hydraulic design code using geometric parameters of IS 150-125-125 centrifugal pump. The experiments of the centrifugal pump have been conducted to verify numerical simulation model. The numerical results show that the blade profile lines has a weak effect on cavitation inception near blade inlet edge position, however it has the key effect on the development of sheet cavitation in impeller, and also influences the distribution of sheet cavitation in impeller channels. A slight changing of blade setting angle will induce significant difference of cavitation in impeller. The sharp changing of impeller blade setting angle causes obvious cavitation region separation near the impeller inlet close to blade suction surface and much more flow loss. The centrifugal pump with blade profile of setting angle gently changing (logarithmic spiral) has the super cavitation performance, which means smaller critical cavitation number and lower vapor cavity volume fraction at the same conditions.

収録刊行物

• International Journal of Fluid Machinery and Systems

  International Journal of Fluid Machinery and Systems 8 (2), 94-101, 2015

  ターボ機械協会、韓国流体機械学会、中国工程熱物理学会、国際水理学会

キーワード

• Centrifugal pump
• Blade profile
• Cavitation behavior
• Numerical simulation

詳細情報

• CRID: 1390282680273455872
• NII論文ID: 130005084246
• DOI: 10.5293/ijfms.2015.8.2.094
• ISSN: 18829554
• Web Site: http://ocean.kisti.re.kr/downfile/crosscheck/kfma1/JAKO201508450939804.pdf
• 本文言語コード: en
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