Noise reduction of a Mach 0.7-0.9 jet by impinging microjets

被引：11
|
作者：
Castelain, T
Béra, JC
Sunyach, M
机构：
[1] Ctr Acoust, F-69134 Ecully, France
[2] INSERM U556, F-69424 Lyon 03, France
来源：
COMPTES RENDUS MECANIQUE | 2006年 / 334卷 / 02期
关键词：
fluid mechanics; jet; noise reduction; microjet;
D O I：
10.1016/j.crme.2006.01.001
中图分类号：
O3 [力学];
学科分类号：
08 ; 0801 ;
摘要：
A global noise reduction of a high-subsonic jet is achieved by experimental use of an impinging microjets system. The microjet velocity relative to the main jet velocity, the longitudinal distance of injection and the number of microjets are the three parameters examined in order to obtain the maximum noise reduction. This optimized microjet configuration is obtained by a balance between low-frequency attenuation and high-frequency noise generation due to the interaction between the microjets and the main jet mixing layer. (c) 2006 Academie des sciences. Published by Elsevier SAS. All rights reserved.
引用
收藏
页码：98 / 104
页数：7
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