Applied Physics B

, Volume 89, Issue 2–3, pp 163–166

Cinematographic imaging of hydroxyl radicals in turbulent flames by planar laser-induced fluorescence up to 5 kHz repetition rate

Rapid communication

DOI: 10.1007/s00340-007-2803-7

Cite this article as:
Kittler, C. & Dreizler, A. Appl. Phys. B (2007) 89: 163. doi:10.1007/s00340-007-2803-7

Abstract

Temporally resolved measurements of transient phenomena in turbulent flames, such as extinction, ignition or flashback, require cinematographic sampling of two-dimensional scalar fields. Hereby, repetition rates must exceed typical flame-inherent frequencies. The high sensitivity planar laser-induced fluorescence (PLIF) has already proved to be a practical method for scalar imaging. The present study demonstrates the feasibility of generating tuneable narrowband radiation in the ultraviolet (UV) spectral range at repetition rates up to 5 kHz. Pulse energies were sufficiently high to electronically excite hydroxyl radicals (OH) produced in a partially-premixed turbulent opposed jet (TOJ) flame. Red-shifted fluorescence was detected two-dimensionally by means of an image-intensified CMOS camera. Sequences comprising up to 4000 frames per run were recorded. Besides statistically stationary conditions, extinction of a turbulent flame due to small Damköhler numbers is presented showing the potential of the technique.

Copyright information

© Springer-Verlag 2007

Authors and Affiliations

  1. 1.FG Energie- und KraftwerkstechnikTU DarmstadtDarmstadtGermany

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