Experimental investigation on noise suppression in supersonic jets from convergent-divergent nozzles with baffles

Yoshiaki Miyazato, Yong Hun Kweon, Toshiyuki Aoki, Mitsuharu Masuda, Kwon Hee Lee, Heuy Dong Kim, Toshiaki Setoguchi, Kazuyasu Matsuo

Research output: Contribution to journalArticle

Abstract

The acoustic properties of supersonic jet noise from a convergent-divergent nozzle with a baffle have been studied experimentally over the range of nozzle pressure ratios from 2.0 to 8.0. Acoustic measurements were conducted in a carefully designed anechoic room providing a free-field environment. A new approach for screech noise suppression by a cross-wire is proposed. Schlieren photographs were taken to visualize the shock wave patterns in the supersonic jet with and without the cross-wire. The effects of the baffle and the cross-wire on acoustic properties are discussed. It is shown that the baffle has little effect on the screech frequency for the underexpanded supersonic jet without the cross-wire. Also, the cross-wire introduced in supersonic jets is found to lead to a significant reduction in overall sound pressure level.

Original languageEnglish
JournalJournal of Thermal Science
Volume12
Issue number3
Publication statusPublished - Dec 1 2003

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convergent-divergent nozzles
baffles
retarding
wire
acoustic properties
jet aircraft noise
pressure ratio
acoustic measurement
sound pressure
photographs
nozzles
rooms
shock waves

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics

Cite this

Experimental investigation on noise suppression in supersonic jets from convergent-divergent nozzles with baffles. / Miyazato, Yoshiaki; Kweon, Yong Hun; Aoki, Toshiyuki; Masuda, Mitsuharu; Lee, Kwon Hee; Kim, Heuy Dong; Setoguchi, Toshiaki; Matsuo, Kazuyasu.

In: Journal of Thermal Science, Vol. 12, No. 3, 01.12.2003.

Research output: Contribution to journalArticle

Miyazato, Y, Kweon, YH, Aoki, T, Masuda, M, Lee, KH, Kim, HD, Setoguchi, T & Matsuo, K 2003, 'Experimental investigation on noise suppression in supersonic jets from convergent-divergent nozzles with baffles', Journal of Thermal Science, vol. 12, no. 3.
Miyazato, Yoshiaki ; Kweon, Yong Hun ; Aoki, Toshiyuki ; Masuda, Mitsuharu ; Lee, Kwon Hee ; Kim, Heuy Dong ; Setoguchi, Toshiaki ; Matsuo, Kazuyasu. / Experimental investigation on noise suppression in supersonic jets from convergent-divergent nozzles with baffles. In: Journal of Thermal Science. 2003 ; Vol. 12, No. 3.
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