A new method for annular jet control based on cross-flow injection

被引：16
|
作者：
Vanierschot, M. [1 ]
Persoons, T. [2 ]
Van den Bulck, E. [1 ]
机构：
[1] Katholieke Univ Leuven, Dept Mech Engn, B-3001 Heverlee, Belgium
[2] Trinity Coll Dublin, Dept Mech Engn, Dublin 2, Ireland
来源：
PHYSICS OF FLUIDS | 2009年 / 21卷 / 02期
关键词：
flow visualisation; jets; nozzles; turbulence; HYSTERESIS; PATTERNS;
D O I：
10.1063/1.3037343
中图分类号：
O3 [力学];
学科分类号：
08 ; 0801 ;
摘要：
We propose a new method for controlling the outflow of a fully turbulent annular jet based on the cross-flow injection of secondary jets. Details are provided on an in-house designed nozzle with a specific geometry that causes an attachment of the annular jet to the nozzle cone when cross-flow injection is applied. When this cross injection is suddenly taken away, the nozzle attached jet evolves toward a stable wall jet. Time-resolved stereo particle image velocimetry measurements are used to characterize the three different flow patterns (annular, nozzle attached, and wall jet) and the aim of this investigation is to gain a deeper understanding into the physics of the transition from the nozzle attached jet to the wall jet.
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页数：9
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