Measurements of Apparent Mass Torque Coefficients of Two-Dimensional Centrifugal Impellers

[+] Author and Article Information
Y. Tsujimoto, K. Imaichi

Osaka University, Toyonaka, Osaka, Japan

T. Moritani

Mitsubishi Electric Corp., Kamakura Works, Kamakura, Kanagawa, Japan

K. Kim

Mobil Sekiyu Corp., Osaka Area Operations Office, Toyonaka, Osaka, Japan

J. Fluids Eng 108(4), 407-413 (Dec 01, 1986) (7 pages) doi:10.1115/1.3242596 History: Received March 28, 1985; Online October 26, 2009


Apparent mass torque coefficients for fluctuations of flow rate and angular velocity are determined experimentally for two-dimensional centrifugal impellers. Nearly sinusoidal fluctuations of flow rate and angular velocity are produced by using crank mechanisms, and the resulting unsteady torque on the impeller is measured. The torque is divided into components in-phase and out-of-phase with the displacements. The in-phase components are used to determine the apparent mass coefficients. Drag torque coefficients are defined and used to represent the out-of-phase components. The tests are conducted under various frequencies and amplitudes of the fluctuations with zero mean flow rate and rotational velocity. The apparent mass torque coefficients are compared with theoretical values obtained under the assumption of a two-dimensional potential flow. The experimental values are 5 to 20 percent larger than the theoretical ones and no appreciable effects of the frequency and the amplitude are observed within the range of the experiments.

Copyright © 1986 by ASME
Your Session has timed out. Please sign back in to continue.





Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Related Journal Articles
Related eBook Content
Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In