Supersonic Jet Noise Reductions Predicted With Increased Jet Spreading Rate

[+] Author and Article Information
Milo D. Dahl

NASA Lewis Research Center, Cleveland, OH 44135

Philip J. Morris

Penn State University, University Park, PA 16802

J. Fluids Eng 120(3), 471-476 (Sep 01, 1998) (6 pages) doi:10.1115/1.2820686 History: Received December 29, 1995; Revised April 10, 1998; Online January 22, 2008


In this paper, predictions are made of noise radiation from single, supersonic, axisymmetric jets. We examine the effects of changes in operating conditions and the effects of simulated enhanced mixing that would increase the spreading rate of the jet shear layer on radiated noise levels. The radiated noise in the downstream direction is dominated by mixing noise and, at higher speeds, it is well described by the instability wave noise radiation model. Further analysis with the model shows a relationship between changes in spreading rate due to enhanced mixing and changes in the far field radiated peak noise levels. The calculations predict that enhanced jet spreading results in a reduction of the radiated peak noise level.

Copyright © 1998 by The American Society of Mechanical Engineers
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