Cause of Cavitation Instabilities in Three Dimensional Inducer

• Kang Donghyuk

  Graduate School of Engineering Science, Osaka University

• Yonezawa Koichi

  Graduate School of Engineering Science, Osaka University

• Horiguchi Hironori

  Graduate School of Engineering Science, Osaka University

• Kawata Yutaka

  Department of Mechanical Engineering, Osaka Institute of Technology

• Tsujimoto Yoshinobu

  Graduate School of Engineering Science, Osaka University

Abstract

Alternate blade cavitation, rotating cavitation and cavitation surge in rocket turbopump inducers were simulated by a three dimensional commercial CFD code. In order to clarify the cause of cavitation instabilities, the velocity disturbance caused by cavitation was obtained by subtracting the velocity vector under non-cavitating condition from that under cavitating condition. It was found that there exists a disturbance flow towards the trailing edge of the tip cavity. This flow has an axial flow component towards downstream which reduces the incidence angle to the next blade. It was found that all of the cavitation instabilities start to occur when this flow starts to interact with the leading edge of the next blade. The existence of the disturbance flow was validated by experiments.

Journal

• International Journal of Fluid Machinery and Systems

  International Journal of Fluid Machinery and Systems 2 (3), 206-214, 2009

  Turbomachinery Society of Japan, Korean Society for Fluid Machinery, Chinese Society of Engineering Thermophysics, IAHR

Keywords

• Inducer
• Cavitation instabilities
• Velocity disturbance
• Three dimensional CFD

Details

• CRID: 1390001205296716032
• NII Article ID: 130004542418
• DOI: 10.5293/ijfms.2009.2.3.206
• ISSN: 18829554
• Web Site: http://ocean.kisti.re.kr/downfile/crosscheck/kfma1/JAKO200920065114186.pdf
• Text Lang: en
• Data Source:
  • JaLC
  • Crossref
  • CiNii Articles
• Abstract License Flag: Disallowed