4D spatiotemporal evolution of combustion intermediates in turbulent flames using burst-mode volumetric laser-induced fluorescence

被引：55

作者：

Halls, Benjamin R. ^{[1
]}

Jiang, Naibo ^{[2
]}

Meyer, Terrence R. ^{[3
]}

Roy, Sukesh ^{[2
]}

Slipchenko, Mikhail N. ^{[2
,3
]}

Gord, James R. ^{[1
]}

机构：

[1] Air Force Res Lab, Aerosp Syst Directorate, Wright Patterson AFB, OH 45433 USA

[2] Spectral Energies LLC, Dayton, OH 45431 USA

[3] Purdue Univ, Sch Mech Engn, W Lafayette, IN 47907 USA

来源：

OPTICS LETTERS | 2017年 / 42卷 / 14期

基金：

美国国家科学基金会;

关键词：

AIR DIFFUSION FLAME; PLANE OH PLIF; HIGH-SPEED; PREMIXED FLAMES; SINGLE-SHOT; JET; FRACTION; PIV;

D O I：

10.1364/OL.42.002830

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

High-speed (20 kHz rate), volumetric laser-induced-fluorescence imaging of combustion intermediates such as a formaldehyde (CH2O) and polycyclic aromatic hydrocarbon (PAH) species is demonstrated for tracking the four-dimensional (4D) evolution of turbulent flames. The third-harmonic, 355 nm output of a burst-mode Nd:YAG laser with a 130 mJ/pulse is expanded to 30 mm diameter for volume illumination of the base region of a methane hydrogen jet diffusion flame. Eight simultaneous images from different viewing angles are used to collect the resulting fluorescence signal for reconstruction of 200 time-sequential three-dimensional volumes over 10 ms duration. The signal-to-noise ratio (SNR) of 300: 1 is achieved after reconstruction with a temporal resolution of 100 ns and spatial resolution of 0.85-1.5 mm. (C) 2017 Optical Society of America

引用

页码：2830 / 2833

页数：4

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