Abstract
The paper presents fine-wire thermocouple measurements of temperature and temperature fluctuations in a confined, two-dimensional, premixed methane-air flame of 0.8 equivalence ratio, stabilised by a backward-facing step, and with bulk flow Reynolds numbers ranging from 2800 to 13000. The results indicate a narrowing of the flame front with decrease in Reynolds number. The temperature fluctuation measurements were compensated for thermal inertia and the probability density functions were bimodal with the probability density at the two extremes of the temperature range increasing with fall in Reynolds number. Temperature power spectra indicated that the preferred frequencies corresponded to the acoustic frequencies of the combustor system, although the influence of vortex shedding was evident at the lowest Reynolds number.
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References
Becker, H. A.; Hottel, H. C.; Williams, G. C. 1967: On the light scatter technique for the study of turbulence and mixing. J. Fluid Mech. 30, 259–284
Bray, K. N. C.; Moss, J. B. 1977: A unified statistical model of the premixed turbulent flame. Acta Astron. 4, 291–319
Cherdron, W.; Durst, F.; Whitelaw, J. H. 1978: Asymmetric flows and instabilities in symmetric ducts with sudden expansion. J. Fluid Mech. 84, 13–31
Dibble, R. W.: Hollenbach. R. E. 1980: Laser thermometry in turbulent flames. Proc. 18th Sym. (Int.) on Combustion. Paper 145. Combustion Institute
El Banhawy, Y., Sivasegaram, S.; Whitelaw, J. H. 1983: Premixed, turbulent combustion of a sudden expansion flow. Combust. Flame (to be published)
Ganji, A. R.; Sawyer, R. F. 1980: Experimental study of the flowfield of a two-dimensional premixed turbulent flame. AIAA J. 18, 817–824
Jones, W. P., Whitelaw, J. H. 1982: Calculation methods for reacting turbulent flows: a review. Combust. Flame, 48, 1–28
Lewis, K. J.; Moss, J. B. 1978: Time-resolved scalar measurements in a confined turbulent premixed flame. 17th Symp. (Int.) on Combustion, Combustion Institute, pp. 267–277
Melling. A. 1975: A technique for simultaneous velocity and concentration measurement, pp. 505–509. Proc. LDA Symposium, Copenhagen
Moneib, H. 1980: Experimental study of the fluctuating temperature in inert and reacting turbulent jets. Ph.D. Thesis, University of London
Moss, J. B. 1980: Simultaneous measurements of concentration and velocity in an open premixed turbulent flame. Combust. Sci. Technol., 22, 119–129
Parker, J.; Sawyer, R. F.; Ganji, A. R. 1979: Measurement of vortex frequencies in a lean, premixed prevaporized combustor. Combust. Sci. Technol., 20, 235–241
Pitz, R. W.; Daily, J. W. 1979: Experimental studies of combustion in a two-dimensional free shear layer. Proc. 2nd Symp. on Turbulent Shear Flows, Imperial College, London
Restivo, A.; Whitelaw, J. H. 1979: Instabilities in sudden-expansion flows of relevance to room ventilation. Proc. 2nd Symposium on Turbulent Shear Flows. 16, 24–29
Yoshida, A.. Tsuji, H. 1978: Measurements of fluctuating temperature and velocity in a turbulent premixed flame. Proc. 17th Symp. (Int.) on Combustion, Combustion Institute, 945–956
Yoshida, A.; Günter, R. 1980: Experimental investigations of the thermal structure of turbulent premixed flames. Combust. Flame, 38, 249–258
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Sivasegaram, S., Whitelaw, J.H. Temperature characteristics of turbulent, premixed flames stabilised on a step. Experiments in Fluids 1, 161–165 (1983). https://doi.org/10.1007/BF00272015
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DOI: https://doi.org/10.1007/BF00272015