Abstract
CARS is an effective non-intrusive technique for measuring gas temperature in combustion environments. In regions of high temperature gradient, however, the CARS signal is complicated by contributions from gas at different temperature. This paper examines theoretically the uncertainty associated with CARS thermometry in steep temperature gradients. In addition, the work compares the temperature predicted from CARS with the adiabatic mixed temperature of the gas resident in the measurement volume. This comparison helps indicate the maximum sample volume size allowed for accurate temperature measurements.
Article PDF
Similar content being viewed by others
Avoid common mistakes on your manuscript.
References
P. Magre, P. Moreau, G. Collin, R. Borghi, M. Peálat: Combust. and Flame 71, 147–168 (1988)
I.G. Shepherd, F.M. Porter, D.A. Greenhalgh: Combust. and Flame 82, 106–109 (1990)
R.P. Lucht, M.A. Maris: CARS Measurements of Temperature Profiles Near a Wall in an Internal Combustion Engineer. Society of Automotive Engineers Technical Paper SAE 870459 (1987)
R.P. Lucht, D. Dunn-Rankin, T. Walter, T. Dreier, S.C. Bopp: Heat Transfer in Engines: Comparison of CARS Thermal Boundary Layer Measurements and Heat Flux Measurements. Society of Automotive Engineers Technical Paper SAE 910722 (1991)
J.-Y. Zhu, D. Dunn-Rankin: Temperature Characteristics of a Combusting Droplet Stream, 24th Int'l. Symp. Combustion, Sydney, Australia (1992)
J.J. Valentini: Coherent Anti-Stokes Raman Spectroscopy. In Spectrometric Techniques, Vol. IV (Academic, New York 1985) pp. 1–62
A.C. Eckbreth: Laser Diagnostics for Combustion Temperature and Species (Abacus, Cambridge 1988)
S.A.J. Druet, J.-P.E. Taran: Prog. Quant. Elect. 7, 1–72 (1981)
R.L. Farrow, L.A. Rahn: J. Opt. Soc. Am. B 2, 903–907 (1985)
R.E. Teets: Opt. Lett. 9, 226–228 (1984)
R.P. Lucht, R.E. Teets, R.M. Green, R.E. Palmer, C.R. Ferguson: Combust. Sci. Techn. 55, 41 (1987)
R.E. Palmer: The CARSFT Computer Code for Calculating Coherent Anti-Stokes Raman Spectra: User and Programmer Information. Sandia National Laboratories Technical Report SAND89-8206, Sandia National Laboratories, Livermore, CA (1989)
D.A. Greenhalgh: J. Raman Spect. 14, 150 (1983)
R.E. Teets: J. Appl. Opt. 25, 855 (1986)
J.-Y. Zhu, D. Dunn-Rankin: Effect of Spatial Averaging in CARS Thermometry, Western States Section/The Combustion Institute, Paper WSS/CI 91-69, Los Angeles, CA (1991)
G.L. Switzer, L.P. Goss: A Hardened CARS System for Temperature and Species Concentration Measurements in Practical Combustion Environments. In Temperature: Its Measurement and Control in Science and Industry, ed. by J.F. Schooley, Vol. 5, (AIP, New York 1982) p. 583
K.W. Boyack: A Study of Turbulent Non-Premixed Jet Flame of CO/N2 using Coherent Anti-Stokes Raman Spectroscopy. Ph.D. Thesis, Dept. of Chem. Engineering, Brigham Young University, Provo (1990)