AN ANALYSIS OF UNSTEADY TORQUE ON A QUASI-THREE-DIMENSIONAL CENTRIFUGAL IMPELLER

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概要

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• The effects of a change in the breadth of a centrifugal impeller on unsteady torque are determined on the assumption of a quasi-three-dimensional flow. Small sinusoidal fluctuations of rotational velocity and/or flow rate are considered. The unsteady :torque is divided into three components : quasi-steady, apparent mass and wake. Numerical results show that the wake component is usually smaller than the other components. Apparent mass coefficients for the two disturbances are given for quasi-three-dimensional impellers. It is found that the outer to inner breadth ratio has little effect on the apparent mass coefficient for flow rate fluctuation but the coefficient for rotational fluctuation is larger for Smaller outer to inner breadth ratio impellers.

• 一般社団法人日本機械学会の論文

著者

• Imaichi Kensaku

  Faculty Of Engineering Science Osaka University

• Tsujimoto Yoshinobu

  Faculty Of Engineering Science Osaka University

• TOMOHIRO TERUHIKO

  Housing Products Research Laboratory, Matsushita Housing Products

• GOTOO MASANORI

  Research Laboratory, Ebara Corporation

• Gotoo Masanori

  Research Laboratory Ebara Corporation

• Tomohiro Teruhiko

  Housing Products Research Laboratory Matsushita Housing Products

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