Mid-infrared laser absorption tomography for quantitative 2D thermochemistry measurements in premixed jet flames

被引：55

作者：

Wei, Chuyu ^{[1
]}

Pineda, Daniel I. ^{[1
]}

Paxton, Laurel ^{[2
]}

Egolfopoulos, Fokion N. ^{[2
]}

Spearrin, R. Mitchell ^{[1
]}

机构：

[1] Univ Calif Los Angeles, Dept Mech & Aerosp Engn, Los Angeles, CA 90095 USA

[2] Univ Southern Calif, Dept Aerosp & Mech Engn, Los Angeles, CA 90089 USA

来源：

APPLIED PHYSICS B-LASERS AND OPTICS | 2018年 / 124卷 / 06期

基金：

美国国家科学基金会;

关键词：

4.2; MU-M; CONCENTRATION PROFILES; TURBULENT COMBUSTION; DIFFUSION FLAME; TEMPERATURE; SPECTROSCOPY; COFLOW; GASES; RAMAN; LIF;

D O I：

10.1007/s00340-018-6984-z

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

A tomographic laser absorption spectroscopy technique, utilizing mid-infrared light sources, is presented as a quantitative method to spatially resolve species and temperature profiles in small-diameter reacting flows relevant to combustion systems. Here, tunable quantum and interband cascade lasers are used to spectrally resolve select rovibrational transitions near 4.98 and 4.19 m to measure CO and , respectively, as well as their vibrational temperatures, in piloted premixed jet flames. Signal processing methods are detailed for the reconstruction of axial and radial profiles of thermochemical structure in a canonical ethylene-air jet flame. The method is further demonstrated to quantitatively distinguish between different turbulent flow conditions.

引用

页数：12

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