Experimental Investigation on Noise Suppression in Supersonic Jets from Convergent-Divergent Nozzles with Baffles

被引：0
|
作者：
Miyazato, Yoshiaki [1 ]
Kweon, Yong-Hun [2 ]
Aoki, Toshiyuki [1 ]
Masuda, Mitsuharu [1 ]
Lee, Kwon-Hee [3 ]
Kim, Heuy-Dong [2 ]
Setoguchi, Toshiaki [3 ]
Matsuo, Kazuyasu [4 ]
机构：
[1] Kyushu Univ, Grad Sch Engn Sci, Kasuga, Fukuoka 8168580, Japan
[2] Andong Natl Univ, Sch Mech Engn, Andong 760749, Kyungbuk, South Korea
[3] Saga Univ, Dept Mech Engn, Saga 8408502, Japan
[4] Univ Kitakyushu, Fac Environm Engn, Wakamatsu Ku, Kitakyushu, Fukuoka 8080135, Japan
来源：
JOURNAL OF THERMAL SCIENCE | 2003年 / 12卷 / 03期
关键词：
convergent-divergent nozzle; noise suppression; screech tone; supersonic jet;
D O I：
10.1007/s11630-003-0079-8
中图分类号：
O414.1 [热力学];
学科分类号：
摘要：
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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收藏
页码：260 / +
页数：5
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