High-speed CH2O PLIF imaging in turbulent flames using a pulse-burst laser system

被引：50

作者：

Gabet, K. N. ^{[1
]}

Patton, R. A. ^{[1
]}

Jiang, N. ^{[1
]}

Lempert, W. R. ^{[1
]}

Sutton, J. A. ^{[1
]}

机构：

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

来源：

APPLIED PHYSICS B-LASERS AND OPTICS | 2012年 / 106卷 / 03期

关键词：

HEAT RELEASE RATE; INDUCED FLUORESCENCE; FORMALDEHYDE; OH; VISUALIZATION; TEMPERATURE; ENGINES;

D O I：

10.1007/s00340-012-4881-4

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

In this manuscript, we demonstrate high-speed (10-kHz-acquisition rate) planar laser-induced fluorescence (PLIF) imaging of formaldehyde (CH2O) in turbulent non-premixed flames. Using the unique pulse-burst laser system (PBLS) at Ohio State University, high-energy laser pulses (Rho 100 mJ/pulse) at 355 nm with 100 mu s pulse separation are generated and used to measure the time-varying CH2O distributions in attached and lifted methane-based turbulent flames. By taking advantage of the tunable, narrow spectral linewidth of the PBLS at 355 nm, the laser output can be frequency-tuned and adjusted to overlap with absorption "peaks" within the tail of the A-X transition of CH2O near 355 nm, thus increasing the acquired signal by as much as a factor of three. The reported signal-to-noise ratio (SNR) exceeds 55, which represents one of the highest SNR reported to date for kilohertz-rate imaging of scalars for comparable spatial resolution. Potential applications and pairings with other diagnostic approaches for high-speed reaction rate and multi-scalar imaging also are discussed.

引用

页码：569 / 575

页数：7

共 38 条

[1] Spatially resolved heat release rate measurements in turbulent premixed flames [J].

Ayoolan, BO ;

Balachandran, R ;

Frank, JH ;

Mastorakos, E ;

Kaminski, CF .

COMBUSTION AND FLAME, 2006, 144 (1-2) :1-16

[2] Single-shot laser-induced fluorescence imaging of formaldehyde with XeF excimer excitation [J].

Böckle, S ;

Kazenwadel, J ;

Kunzelmann, T ;

Shin, DI ;

Schulz, C .

APPLIED PHYSICS B-LASERS AND OPTICS, 2000, 70 (05) :733-735

[3]

Böckle S, 2000, P COMBUST INST, V28, P279

[4] New Perspectives on Turbulent Combustion: Multi-Parameter High-Speed Planar Laser Diagnostics [J].

Boehm, Benjamin ;

Heeger, Christof ;

Gordon, Robert L. ;

Dreizler, Andreas .

FLOW TURBULENCE AND COMBUSTION, 2011, 86 (3-4) :313-341

[5] Simultaneous visualisation of transient species in flames by planar-laser-induced fluorescence using a single laser system [J].

Bombach, R ;

Käppeli, B .

APPLIED PHYSICS B-LASERS AND OPTICS, 1999, 68 (02) :251-255

[6] Strategies for formaldehyde engines using a single-mode detection in flames and Nd:YAG/OPO laser system [J].

Brackmann, C ;

Li, ZS ;

Rupinski, M ;

Docquier, N ;

Pengloan, G ;

Aldén, M .

APPLIED SPECTROSCOPY, 2005, 59 (06) :763-768

[7] Laser-induced fluorescence of formaldehyde in combustion using third harmonic Nd:YAG laser excitation [J].

Brackmann, C ;

Nygren, J ;

Bai, X ;

Li, ZS ;

Bladh, H ;

Axelsson, B ;

Denbratt, I ;

Koopmans, L ;

Bengtsson, PE ;

Aldén, M .

SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY, 2003, 59 (14) :3347-3356

[8] Investigation of droplet ignition under microgravity conditions using laser-based techniques - an overview [J].

Burkert, A ;

Paa, W ;

Schmidl, G ;

Triebel, W ;

Eigenbrod, C .

ACTA ASTRONAUTICA, 2004, 55 (3-9) :199-209

[9] Single-shot imaging of formaldehyde in hydrocarbon flames by XeF excimer laser-induced fluorescence [J].

Burkert, A ;

Grebner, D ;

Müller, D ;

Triebel, W ;

König, J .

PROCEEDINGS OF THE COMBUSTION INSTITUTE, 2000, 28 (02) :1655-1661

[10] Finite Rate Chemistry Effects in Highly Sheared Turbulent Premixed Flames [J].

Dunn, Matthew J. ;

Masri, Assaad R. ;

Bilger, Robert W. ;

Barlow, Robert S. .

FLOW TURBULENCE AND COMBUSTION, 2010, 85 (3-4) :621-648

← 1 2 3 4 →