Flow tagging velocimetry in a superorbital expansion tube

被引：3

作者：

Littleton, BN ^{[1
]}

Bishop, AI ^{[1
]}

McIntyre, TJ ^{[1
]}

Barker, PF ^{[1
]}

Rubinsztein-Dunlop, H ^{[1
]}

机构：

[1] Univ Queensland, Dept Phys, Ctr Laser Sci, Brisbane, Qld 4072, Australia

来源：

SHOCK WAVES | 2000年 / 10卷 / 03期

关键词：

velocimetry; expansion tube; flow tagging; laser enhanced ionisation; sodium;

D O I：

10.1007/s001930050010

中图分类号：

O3 [力学];

学科分类号：

08 ; 0801 ;

摘要：

A non-intrusive laser-based method for direct velocity measurements has been demonstrated in a superorbital flow facility. The method is based upon laser enhanced ionisation velocimetry in which a tagged region is created by two step excitation of sodium and subsequent collisional ionisation. The achieved depletion of neutral atoms is then interrogated by planar laser induced fluorescence. The velocities were measured in the freestream at a superorbital condition yielding 9.20 +/- 0.11 km/s. These results compare favourably with the measured shock speeds in the facility.

引用

页码：225 / 228

页数：4

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