OSCILLATION MODES OF UNDEREXPANDED JETS ISSUING FROM SQUARE AND EQUILATERAL TRIANGULAR NOZZLES

被引：9
|
作者：
UMEDA, Y
ISHII, R
机构：
[1] Department of Aeronautical Engineering, Kyoto University, 606, Yoshida Honmachi, Sakyo-ku Kyoto
来源：
JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA | 1994年 / 95卷 / 04期
关键词：
D O I：
10.1121/1.408700
中图分类号：
O42 [声学];
学科分类号：
070206 ; 082403 ;
摘要：
The oscillation modes of underexpanded jets exhausted from square and equilateral triangular nozzles were investigated experimentally. Two stages were observed for both jets. The oscillation modes corresponding to these stages were identified by using optical and acoustical methods. The experimental results show that oscillation modes for both jets are first axisymmetric and then sinuous with increasing jet pressure ratio. The helical oscillation mode, which appeared for the circular jet, was not observed in these jets. The hysteresis phenomenon found for the circular jet cannot be seen in these jets.
引用
收藏
页码：1853 / 1857
页数：5
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