Experimental exploration of underexpanded supersonic jets

被引：39

作者：

Andre, Benoit ^{[1
]}

Castelain, Thomas ^{[1
,2
]}

Bailly, Christophe ^{[1
,3
]}

机构：

[1] Univ Lyon, Ecole Cent Lyon, Lab Mecan Fluides & Acoust, CNRS,UMR 5509, F-69134 Ecully, France

[2] Univ Lyon 1, F-69622 Villeurbanne, France

[3] Inst Univ France, Paris, France

来源：

SHOCK WAVES | 2014年 / 24卷 / 01期

关键词：

Supersonic jet; Shock-cell structure; Laser Doppler velocimetry; Particle lag; Pressure measurements; FLOW; PARTICLES;

D O I：

10.1007/s00193-013-0457-4

中图分类号：

O3 [力学];

学科分类号：

08 ; 0801 ;

摘要：

Two underexpanded free jets at fully expanded Mach numbers M-j = 1.15 and 1.50 are studied. Schlieren visualizations as well as measurements of static pressure, Pitot pressure and velocity are performed. All these experimental techniques are associated to obtain an accurate picture of the jet flow development. In particular, expansion, compression and neutral zones have been identified in each shock cell. Particle lag is considered by integrating the equation of motion for particles in a fluid flow and it is found that the laser Doppler velocimetry is suitable for investigating shock-containing jets. Even downstream of the normal shock arising in the M-j = 1.50 jet, the measured gradual velocity decrease is shown to be relevant.

引用

页码：21 / 32

页数：12