Flame Structure and Dynamics in a Premixed Dual-Mode Scramjet Combustor from Fluorescence Imaging

被引：10

作者：

Allison, Patton M. ^{[1
]}

Frederickson, Kraig ^{[1
]}

Kirik, Justin W. ^{[2
]}

Rockwell, Robert D. ^{[2
]}

Goyne, Christopher P. ^{[2
]}

Lempert, Walter R. ^{[1
]}

Sutton, Jeffrey A. ^{[1
]}

机构：

[1] Ohio State Univ, Mech & Aerosp Engn, Columbus, OH 43210 USA

[2] Univ Virginia, Mech & Aerosp Engn, Charlottesville, VA 22904 USA

来源：

JOURNAL OF PROPULSION AND POWER | 2019年 / 35卷 / 03期

关键词：

PULSE-BURST LASER; SUPERSONIC COMBUSTION; SPECTROSCOPY; VISUALIZATION; HYDROCARBONS; FORMALDEHYDE; IGNITION;

D O I：

10.2514/1.B37057

中图分类号：

V [航空、航天];

学科分类号：

08 ; 0825 ;

摘要：

Formaldehyde (CH2O) planar laser- induced fluorescence (PLIF) imaging was performed in a premixed, ethylenefueled dual- mode scramjet combustor to study the flame structure and dynamic flame behavior. CH2OPLIF is used as a marker to provide information on the structure and position of the lower-temperature portion of the reaction zone. Low-repetition-rate (10 Hz) measurements were acquired at several cross-flow planes along the axial flow direction. Statistical analysis of the CH2O topology indicates sparse concentrations of formaldehyde that are intermittently detected by the PLIF measurement. Comparisons between previous large-eddy simulations, laboratory-scale flames, and the current experimental measurements indicate discrepancies between the expected and measured formaldehyde concentrations and structure. High-speed formaldehyde PLIF also was conducted at 50 kHz to further investigate the intermittency of the formaldehyde layers in the flow.

引用

页码：552 / 564

页数：13

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