Directionality and pulsing of acoustic propagation to the far-field of a supersonic jet flow

Genevieve M. Starke, Jacques Lewalle, Mark Glauser, Sivaram Gogineni

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

1 Scopus citations

Abstract

We analyze simultaneous data in the near- and far-field of a 2-stream supersonic jet. The flow combines a rectangular jet at Ma = 1.6 and a rectangular wall jet at Ma = 1.0 separating the primary jet from a deck plate. We treat simultaneous data from deck- mounted kulite sensors and far-field microphones sampled for 10 s at 100 kHz. Aside from a clear 33kHz tone, traced previously to Kelvin-Helmholtz instability at the trailing edge of the splitter plate between the jets, a number of weaker pulses are identified at lower frequencies of the order of 1 to 5 kHz. The pulse frequencies are active in correlations between the sensors. In particular, the cross-correlation between near- and far-field shows bands of activity that differ for the various pairs of sensors (6 kulites and 12 microphones); the lags between near- and far-field are also frequency and direction-dependent. Significant departures from the expected propagation time (about 11 ms) are discussed. In addition to directional dependencies of most statistics, the modulation of the 33 kHz tone by near-field pulsing is documented.

Original languageEnglish (US)
Title of host publicationAIAA SciTech Forum - 55th AIAA Aerospace Sciences Meeting
PublisherAmerican Institute of Aeronautics and Astronautics Inc.
ISBN (Electronic)9781624104473
DOIs
StatePublished - 2017
Event55th AIAA Aerospace Sciences Meeting - Grapevine, United States
Duration: Jan 9 2017Jan 13 2017

Publication series

NameAIAA SciTech Forum - 55th AIAA Aerospace Sciences Meeting

Other

Other55th AIAA Aerospace Sciences Meeting
CountryUnited States
CityGrapevine
Period1/9/171/13/17

ASJC Scopus subject areas

  • Aerospace Engineering

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    Starke, G. M., Lewalle, J., Glauser, M., & Gogineni, S. (2017). Directionality and pulsing of acoustic propagation to the far-field of a supersonic jet flow. In AIAA SciTech Forum - 55th AIAA Aerospace Sciences Meeting [AIAA 2017-0227] (AIAA SciTech Forum - 55th AIAA Aerospace Sciences Meeting). American Institute of Aeronautics and Astronautics Inc.. https://doi.org/10.2514/6.2017-0227