Supersonic jet noise reductions predicted with increased jet spreading rate

Milo D. Dahl, Philip J. Morris

Research output: Contribution to journalArticlepeer-review

1 Scopus citations


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.

Original languageEnglish (US)
Pages (from-to)471-476
Number of pages6
JournalJournal of Fluids Engineering, Transactions of the ASME
Issue number3
StatePublished - Sep 1998

All Science Journal Classification (ASJC) codes

  • Mechanical Engineering


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