Development of a two-line OH-laser-induced fluorescence thermometry diagnostics strategy for gas-phase temperature measurements in engines
- 29 October 2008
- journal article
- Published by Optica Publishing Group in Applied Optics
- Vol. 47 (31), 5871-5885
- https://doi.org/10.1364/ao.47.005871
Abstract
This study aims at optimizing two-line OH thermometry strategies for in-cylinder measurement in internal combustion engines. Various aspects are investigated experimentally, such as the selection of suitable OH lines and the possibility of using a single calibration coefficient for variable mixture composition, temperature, and pressure conditions. Two kinds of experimental systems have been investigated. First, a laminar methane–air burner flame at atmospheric pressure, whose stability allowed the determination of OH-laser-induced fluorescence (LIF) intensity ratios from nonsimultaneous imaging. The temperature distribution in the flame is presented for OH-transition pairs with various temperature sensitivities. The burner flame was studied for equivalence ratios from to 1.30 in order to check for the stability of calibration over various flame conditions. Additionally, OH LIF images were acquired in an optical engine for the chosen OH transitions yielding data about the effect of pressure on OH LIF signals under realistic experimental conditions.
Keywords
This publication has 9 references indexed in Scilit:
- Phase-locked two-line OH planar laser-induced fluorescence thermometry in a pulsating gas turbine model combustor at atmospheric pressureApplied Optics, 2005
- Planar laser-induced fluorescence of OH in high-pressure cryogenic LOx/GH2 jet flamesCombustion and Flame, 2005
- LIF imaging and 2D temperature mapping in a model combustor at elevated pressureAerospace Science and Technology, 2000
- Applications of planar laser induced fluorescence in turbulent reacting flowsMeasurement Science and Technology, 2000
- Rate-equation modeling of single- and multiple-quantum vibrational energy transfer of OH (A 2 Σ + , v ′ =0 to 3)Applied Physics B Laser and Optics, 1999
- OH laser-induced fluorescence at high pressures: spectroscopic and two-dimensional measurements exciting the A-X (1,0) transitionApplied Physics B Laser and Optics, 1997
- Application of quantitative two-line OH planar laser-induced fluorescence for temporally resolved planar thermometry in reacting flowsApplied Optics, 1994
- OH rotational temperature from two-line laser-excited fluorescenceApplied Optics, 1981
- The ultraviolet bands of OH Fundamental dataJournal of Quantitative Spectroscopy and Radiative Transfer, 1962