V. Sriramulu

U. S.Premananda Shet

IIT Madras is a public technical and research university located in Chennai, Tamil Nadu. Founded in 1959, it is recognised as an Institute of National Importance.

IIT Madras has been ranked as the top engineering institute in India for four years in a row by the National Institutional Ranking Framework of the MHRD

It currently offers undergraduate, postgraduate and research degrees across 16 disciplines in Engineering, Sciences, Humanities and Management. About 596 faculty belonging to science and engineering departments and centres of the Institute are engaged in teaching, research and industrial consultancy.

IIT Madras

Correlation of Turbulent Burning Velocity Data for Enclosed Flames

Combustion Science and Technology

The present investigation highlights a new approach to the correlation of turbulent burning velocity data, which basically stems from the fact that detailed measurements of turbulence, using wire meshes and perforated discs as generators of isotropic turbulence, show a unique trend when the ratio of Kolmogorov microscale η to lateral macroscale L is plotted against the r.m.s. turbulent velocity u′. For weak turbulence, the data obtained for different generators telescoped into a single curve, whereas for strong turbulence distinct demarcations could be detected for different grids. This cardinal finding was further pursued apropos of turbulent burning velocity data. Systematic measurements were carried out in cold flows using a hot-wire anemometer and a real time wave analyzer from which the requisite intensity and scales of turbulence were deduced. Subsequently burning velocity data for methane-air mixtures burning in an open burner were obtained by analyzing densitometrically the direct photographs of flames. Analysis reveals that two correlations are adequate for interpreting the data obtained. When turbulence intensity is low, the ratio of turbulent to laminar burning velocity ST/SL depends only on η/L in much the same fashion as u′/SL while for large intensities, u′/SL turns out to be an additional parameter besides η/L. When this analysis is extended to the data of other investigators, the forms of the correlating equations remain the same as in the present work but require different empirical constants. To sum up, it may be said that for weak turbulence η/L alone is adequate as a correlating parameter, while for strong turbulence both u′/SL and η/L must be considered. © 1981 Combustion Institute.

Symposium (International) on Combustion

A new approach to the correlation of turbulent burning velocity data

Dependence of turbulent burning velocity on turbulent reynolds number and ratio of flaminar burning velocity to R.M.S. turbulent velocity

Combustion and Flame

Criteria for existence of wrinkled laminar flame structure of turbulent premixed flames

Proceedings of the Royal Society of London. A. Mathematical and Physical Sciences

The structure and propagation of turbulent flames

Turbulence and turbulent flame propagation—A critical appraisal

Measurement of turbulent burning velocity for large turbulent Reynolds numbers

Correlation of Turbulent Burnina Velocity Data for Enclosed Flames

Journal	Combustion Science and Technology
ISSN	00102202
Open Access	No