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

doi:10.1007/s11630-003-0079-8

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

Thermo Fluid Dynamics Division

Research output: Contribution to journal › Article › peer-review

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 language	English
Pages (from-to)	260-263
Number of pages	4
Journal	Journal of Thermal Science
Volume	12
Issue number	3
DOIs	https://doi.org/10.1007/s11630-003-0079-8
Publication status	Published - 2003

All Science Journal Classification (ASJC) codes

Condensed Matter Physics

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10.1007/s11630-003-0079-8

Cite this

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title = "Experimental investigation on noise suppression in supersonic jets from convergent-divergent nozzles with baffles",

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.",

author = "Yoshiaki Miyazato and Kweon, {Yong Hun} and Toshiyuki Aoki and Mitsuharu Masuda and Lee, {Kwon Hee} and Kim, {Heuy Dong} and Toshiaki Setoguchi and Kazuyasu Matsuo",

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doi = "10.1007/s11630-003-0079-8",

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issn = "1003-2169",

publisher = "Science in China Press",

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T1 - Experimental investigation on noise suppression in supersonic jets from convergent-divergent nozzles with baffles

AU - Miyazato, Yoshiaki

AU - Kweon, Yong Hun

AU - Aoki, Toshiyuki

AU - Masuda, Mitsuharu

AU - Lee, Kwon Hee

AU - Kim, Heuy Dong

AU - Setoguchi, Toshiaki

AU - Matsuo, Kazuyasu

PY - 2003

Y1 - 2003

N2 - 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.

AB - 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.

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

Abstract

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