PLANAR LASER-INDUCED-FLUORESCENCE IMAGING MEASUREMENTS OF OH AND HYDROCARBON FUEL FRAGMENTS IN HIGH-PRESSURE SPRAY-FLAME COMBUSTION

被引：43

作者：

ALLEN, MG ^{[1
]}

MCMANUS, KR ^{[1
]}

SONNENFROH, DM ^{[1
]}

PAUL, PH ^{[1
]}

机构：

[1] SANDIA NATL LABS,COMBUST RES FACIL,LIVERMORE,CA 94551

来源：

APPLIED OPTICS | 1995年 / 34卷 / 27期

关键词：

FLUORESCENCE; COMBUSTION DIAGNOSTICS; HIGH-PRESSURE COMBUSTION; OH; POLYCYCLIC AROMATIC HYDROCARBON; SPRAY FLAME;

D O I：

10.1364/AO.34.006287

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

Planar laser-induced fluorescence images of OH have been obtained in liquid-fueled spray flames burning heptane, ethanol, and methanol over a range of pressures from 0.1 to 1.0 MPa. In addition to the OH fluorescence, a nonresonant fluorescence interference that increased rapidly with pressure was detected. Examination of the spectrum of this interference indicates that it arises from hydrocarbon fuel-fragment species in the fuel-rich zones of the flame. The pressure dependence of the fluorescence signal is examined in both steady-state and time-dependent analyses, and a model for evaluation of pressure effects and quenching variations in quantitative imaging measurements in nonpremixed flame environments is presented. The results indicate that increased combustor pressure results in a rapid rise of the volume fraction of hydrocarbon fragments and a decrease in the OH volume fraction.

引用

页码：6287 / 6300

页数：14

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