Influence of Axial Rotor Offset on Residual Axial Thrust Characteristics of a Centrifugal Pump at Low Flow Rates

• Takamine Taiki

  Department of Mechanical Engineering, Kyushu University

• Nakano Shotaro

  Department of Mechanical Engineering, Kyushu University

• Watanabe Satoshi

  Department of Mechanical Engineering, Kyushu University

• Watanabe Hiroyoshi

  Fluid Machinery & System Company, Ebara Corporation

Abstract

In this study, experimental/numerical investigations on the effect of axial offset of rotor offset in a final stage model of a three-stage centrifugal pump are carried out. The axial offset is intentionally given to the shaft system to both of discharge/suction side. As a result, the axial thrust is significantly affected by the axial offset in the flow rate range below 50% of the design flow rate. From the flow field computed in CFD analysis, the flow mechanism induced by the axial offset leading to the change in the axial thrust is elucidated; the interaction between the back flow form the diffuser and the impeller exiting flow is affected by the axial offset, which are responsible for the change in the angular momentum brought into side gaps and therefore in the pressure distribution inside the side gaps.

Journal

• International Journal of Fluid Machinery and Systems

  International Journal of Fluid Machinery and Systems 13 (4), 655-667, 2020

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

Keywords

• Centrifugal pump
• Axial thrust
• Axial rotor offset
• Unsteady RANS simulation

Details

• CRID: 1390567901494659968
• NII Article ID: 130007931191
• DOI: 10.5293/ijfms.2020.13.4.655
• ISSN: 18829554
• Text Lang: en
• Data Source:
  • JaLC
  • Crossref
  • CiNii Articles
• Abstract License Flag: Disallowed