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Unsteady Forces and Noise From Fan-in-Wing Model in Cross Flow FREE

[+] Author Affiliations
A. N. Abdelhamid

Carleton University, Ottawa, ON, Canada

U. W. Schaub

National Research Council of Canada, Ottawa, ON, Canada

Paper No. 72-GT-92, pp. V001T01A091; 15 pages
doi:10.1115/72-GT-92
From:
  • ASME 1972 International Gas Turbine and Fluids Engineering Conference and Products Show
  • ASME 1972 International Gas Turbine and Fluids Engineering Conference and Products Show
  • San Francisco, California, USA, March 26–30, 1972
  • Conference Sponsors: International Gas Turbine Institute
  • ISBN: 978-0-7918-7981-8
  • Copyright © 1972 by ASME

abstract

Unsteady forces and noise from a fan-in-wing model operated in cross flow are investigated. Based on experimentally determined inlet and outlet flow distortions the unsteady forces on the rotor blades are determined analytically taking into account the effects of blade angle of attack and blade camber. Results of unsteady forces due to flow distortions are compared with those on the rotor blades due to potential interaction with the stator vanes. The calculated unsteady forces on rotor blades are used to calculate the discrete frequency noise emission characteristics of the fan. The predicted sound pressure levels are compared with those due to potential and viscous interactions. It is shown that the predicted unsteady forces on the rotor blades due to cross velocity do not significantly contribute to the noise generated by the fan.

Copyright © 1972 by ASME
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