Jet noise predictions from unsteady Navier-Stokes simulationsNumerical solutions of the Navier-Stokes equations are employed to predict the characteristics of round jets at supersonic speeds. The simulations are performed with a finite volume method which is fourth order accurate in space and second order in time. The overall sound pressure level (OASPL) in the near field of a round free jet is over-predicted by roughly 8 dB relative to an experimental correlation. In an impinging jet, shock motion and vortex stretching are identified as noise generation mechanisms in the impingement zone.
Document ID
19910034706
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Childs, Robert E. (Nielsen Engineering and Research, Inc. Mountain View, CA, United States)
Bower, William W. (Nielsen Engineering and Research, Inc. Mountain View, CA, United States)
Chmielewski, Gerald E. (McDonnell Douglas Research Laboratories Saint Louis, MO, United States)
Howe, Michael S. (BBN Systems and Technologies Corp. Cambridge, MA, United States)