RESEARCH PAPERS: Noise Control and Acoustics

An Euler Code Calculation of Blade-Vortex Interaction Noise

[+] Author and Article Information
J. C. Hardin

NASA Langley Research Center, Hampton, VA 23665

S. L. Lamkin

PRC Kentron, Inc., Hampton, VA 23666

J. Vib., Acoust., Stress, and Reliab 109(1), 29-36 (Jan 01, 1987) (8 pages) doi:10.1115/1.3269391 History: Received August 01, 1986; Online November 23, 2009


An Euler code has been developed for calculation of noise radiation due to the interaction of a distributed vortex with a Joukowski airfoil. The time-dependent incompressible flow field is first determined and then integrated to yield the resulting sound production through use of the elegant low-frequency Green’s function approach. This code has several interesting numerical features involved in the vortex motion and in continuous satisfaction of the Kutta condition. In addition, it removes the limitations on Reynolds number and is much more efficient than an earlier Navier-Stokes code. Results indicate that the noise production is due to the deceleration and subsequent acceleration of the vortex as it approaches and passes the airfoil. Predicted acoustic levels and frequencies agree with measured data although a precise comparison would require the strength, size, and position of the incoming vortex to be known.

Copyright © 1987 by ASME
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