热科学学报（英文版）2003，Vol.12Issue(3)：260-263,269,5.
Experimental Investigation on Noise Suppression in Supersonic Jets from Convergent-Divergent Nozzles with Baffles
Experimental Investigation on Noise Suppression in Supersonic Jets from Convergent-Divergent Nozzles with Baffles
Yoshiaki Miyazato 1Yong-Hun Kweon 2Toshiyuki Aoki 1Mitsuharu Masuda 1Kwon-Hee Lee 3Heuy-Dong Kim 2Toshiaki Setoguchi 3Kazuyasu Matsuo4
作者信息
- 1. Graduate School of Engineering Sciences, Kyushu University, 6-1, Kasuga-kouen, Kasuga, Fukuoka,816-8580, Japan
- 2. School of Mechanical Engineering, Andong National University, 388, Songchun-dong, Andong,Kyungbuk, 760-749, Korea
- 3. Department of Mechanical Engineering, Saga University, 1, Honjo-machi, Saga, Saga, 840-8502, Japan
- 4. Faculty of Environmental Engineering, The University of Kitakyushu, 1-1, Hibikino, Wakamatsu-ku, Kitakyushu, Fukuoka, 808-0135, Japan
- 折叠
摘要
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.关键词
convergent-divergent nozzle/noise suppression/screech tone/supersonic jetKey words
convergent-divergent nozzle/noise suppression/screech tone/supersonic jet引用本文复制引用
Yoshiaki Miyazato,Yong-Hun Kweon,Toshiyuki Aoki,Mitsuharu Masuda,Kwon-Hee Lee,Heuy-Dong Kim,Toshiaki Setoguchi,Kazuyasu Matsuo..Experimental Investigation on Noise Suppression in Supersonic Jets from Convergent-Divergent Nozzles with Baffles[J].热科学学报（英文版）,2003,12(3):260-263,269,5.
