Quantitative measurement of density fluctuations with a full-field laser interferometric vibrometer
Quantitative measurement of density fluctuations with a full-field laser interferometric vibrometer
复制标题
使用全场激光干涉测振仪定量测量密度波动
DOI:
10.1007/s00348-019-2842-y
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发表时间:
2020
影响因子:
2.4
通讯作者:
J. Czarske
中科院分区:
文献类型:
--
作者:
F. Greiffenhagen;J. Woisetschläger;J. Gürtler;J. Czarske
AbstractModern, lean and premixed gas turbine combustion concepts for low NOxemissions are prone to combustion instabilities. In a previous work it was shown that laser interferometric vibrometry (LIV) can be used to record global as well as local heat release fluctuations in swirl-stabilized premixed methane flames quantitatively, if other effects influencing density are small. In this work a newly developed camera-based full-field LIV system (CLIV) was applied to a lean, confined, premixed and swirl-stabilized methane flame under atmospheric conditions. Instead of time-consuming pointwise scanning of the flame, CLIV records full-field line-of-sight density fluctuations with high spatio-temporal resolution. With a recording rate of 200 kHz, CLIV enables the visualization of highly unsteady processes in fluid dynamics and combustion research. As an example for an unsteady process, the propagation of the flame front through a lean, premixed gas volume is visualized during an ignition process. A discussion of algorithms and assumptions necessary to calculate heat release oscillations from density oscillations is presented and applied to phase-averaged data recorded with CLIV for this type of flame. As reference, OH* chemiluminescence data were recorded simultaneously. While density gradients travelling with the flow are recorded by LIV and CLIV, chemiluminescence imaging will show nothing in the absence of chemical reaction.Graphic abstractaTime-averaged density gradient within the combustor in lateral direction.bDensity fluctuations along line-of-sight 7 ms after ignition.cPhase-averaged and local heat release fluctuations at 225 Hz perturbation frequency
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DOI:
--
发表时间:
2015
期刊:
影响因子:
--
作者:
Johannes Peterleithner;Nicolai V. Stadlmair;J. Woisetschläger;T. Sattelmayer
通讯作者:
T. Sattelmayer
DOI:
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发表时间:
1998
期刊:
Other Conferences
影响因子:
--
作者:
A. Lewin
通讯作者:
A. Lewin
DOI:
--
发表时间:
2022
期刊:
影响因子:
--
作者:
Takagi;M. Sakamoto;T. Ishihara;K. Okita;S. Yabukami,M. Yamaguchi;and K.Chatani;山口雅春,廣瀬祐介,宇田川真介,山岸雅人,太田匡則,北洞貴也,稲毛達朗
通讯作者:
山口雅春,廣瀬祐介,宇田川真介,山岸雅人,太田匡則,北洞貴也,稲毛達朗
影响因子:
2.4
作者:
A. Fischer;J. König;J. Czarske;Johannes Peterleithner;J. Woisetschläger;Thomas Leitgeb
通讯作者:
Thomas Leitgeb
DOI:
--
发表时间:
2011
期刊:
影响因子:
--
作者:
M. Raffel;R. Hernandez;Benjamin Heine;A. Schröder;K. Mulleners
通讯作者:
K. Mulleners