Time-resolved (kHz) 3D imaging of OH PLIF in a flame

被引：66

作者：

Wellander, Rikard ^{[1
]}

Richter, Mattias ^{[1
]}

Alden, Marcus ^{[1
]}

机构：

[1] Lund Univ, Dept Phys, Div Combust Phys, S-22100 Lund, Sweden

来源：

EXPERIMENTS IN FLUIDS | 2014年 / 55卷 / 06期

关键词：

LASER-INDUCED FLUORESCENCE; 3-DIMENSIONAL CONCENTRATION MEASUREMENTS; TURBULENT PREMIXED FLAMES; SYSTEM; ENGINE; FLOW; PIV; JET;

D O I：

10.1007/s00348-014-1764-y

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

Based on scanning planar laser-induced fluorescence of OH, a measurement system with the capability to record time-resolved three-dimensional image sequences of the OH concentration and the flame front is demonstrated on a premixed flame. A dual-mirror scanning system is used to obtain equidistance between the illuminated planes. Non-uniformities in the laser sheet and laser absorption in the flame are compensated for as the position-and time-dependent OH concentration is calculated throughout the measurement volume. A method for identifying the flame front in large data sets with a single set of filtering parameter is demonstrated. The artefacts introduced by the non-instantaneous recording of the measurement volume are suppressed using linear interpolation from successive recordings in the same measurement plane. The impact from filtering and image post-processing on the achieved spatial resolution is investigated. A final spatial and temporal resolution of 3.2 x 3.2 x 0.75 lines/mm and 2 ms, respectively, are obtained in a measurement volume spanning 11 x 22 x 6 mm during a time span of 0.5 s.

引用

页数：12

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