SUBRESOLUTION MEASUREMENTS OF UNMIXED FLUID USING ELECTRONIC QUENCHING OF NO-A2-SIGMA

被引：11

作者：

PAUL, PH

CLEMENS, NT

机构：

[1] Combustion Research Facility, Sandia National Laboratories, Livermore, CA

来源：

OPTICS LETTERS | 1993年 / 18卷 / 02期

关键词：

Diffusion - Fluorescence - Imaging techniques - Laser applications - Nitrogen oxides - Optical variables measurement - Turbulent flow;

D O I：

10.1364/OL.18.000161

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

Planar laser-induced fluorescence of NO has been used to acquire instantaneous two-dimensional images of the extent of fluid unmixedness in a turbulent flow. Measurements accurate to the molecular diffusion scale are made by taking advantage of the large range of cross sections for electronic collisional quenching of NO A2SIGMA+. The recorded signal is known to be related to that fraction of the sample volume which contains pure (unmixed) fluid. Image measurements of an axisymmetric shear layer are presented and are reduced to mixed fluid probability distributions.

引用

页码：161 / 163

页数：3