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
Pages (from-to)260-263
Number of pages4
JournalJournal of Thermal Science
Volume12
Issue number3
DOIs
Publication statusPublished - 2003

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics

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    Miyazato, Y., Kweon, Y. H., Aoki, T., Masuda, M., Lee, K. H., Kim, H. D., Setoguchi, T., & Matsuo, K. (2003). Experimental investigation on noise suppression in supersonic jets from convergent-divergent nozzles with baffles. Journal of Thermal Science, 12(3), 260-263. https://doi.org/10.1007/s11630-003-0079-8