On the possible role of short-range shock formation and coalescence in jet aeroacoustic source characterization

Micah R. Shepherd, Kent L. Gee

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

The number of jet and rocket noise studies has increased in recent years as researchers have sought to better understand aeroacoustic source and radiation characteristics using predominantly linear reconstruction techniques. While jet and rocket noise is often finite-amplitude in nature, little is known about the existence of shock formation and coalescence close to the source. A numerical experiment determines that significant shock coalescence can occur when finiteamplitude noise is propagated over short distances at amplitudes similar to those expected of jet and rocket noise. Additionally, the errors associated with using linear reconstruction techniques are shown to be large when significant shock coalescence occurs. The results of this experiment point out the need for additional studies targeting shock coalescence and its possible role in near field jet and rocket noise propagation.

Original languageEnglish (US)
Title of host publication38th International Congress and Exposition on Noise Control Engineering 2009, INTER-NOISE 2009
Pages875-881
Number of pages7
StatePublished - Dec 1 2009
Event38th International Congress and Exposition on Noise Control Engineering 2009, INTER-NOISE 2009 - Ottawa, ON, Canada
Duration: Aug 23 2009Aug 26 2009

Publication series

Name38th International Congress and Exposition on Noise Control Engineering 2009, INTER-NOISE 2009
Volume2

Other

Other38th International Congress and Exposition on Noise Control Engineering 2009, INTER-NOISE 2009
CountryCanada
CityOttawa, ON
Period8/23/098/26/09

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All Science Journal Classification (ASJC) codes

  • Acoustics and Ultrasonics

Cite this

Shepherd, M. R., & Gee, K. L. (2009). On the possible role of short-range shock formation and coalescence in jet aeroacoustic source characterization. In 38th International Congress and Exposition on Noise Control Engineering 2009, INTER-NOISE 2009 (pp. 875-881). (38th International Congress and Exposition on Noise Control Engineering 2009, INTER-NOISE 2009; Vol. 2).