Experimental study of the correlation for turbulent burning velocity at subatmospheric pressure

Turbulent burning velocity is one of the most relevant parameters to characterize premixed turbulent flames. Different correlation has been proposed estimate this parameter. However, them have obtained using experimental data at atmospheric pressure or higher. The present study focused on obtaining a for sub-atmospheric pressure. was experimentally calculated burner method, where premix flames are generated in Bunsen burner. Stoichiometric and lean conditions were evaluated 0.85 atm 0.98 atm, whereas turbulence intensity varied each condition. Perforated plates hot-wire anemometer used generate measure intensity. Schlieren images obtain average angle flame calculate velocity. Experiments theory show that deflagration rate decrease as decrease. speed decreased by up 16 % concerning same intensity, discharge velocity, ambient temperature, according results. comparison among results correlations reported literature exposes prediction issues because fitted conditions. A general raised between (ST), laminar (SL) (u’) from data. This form For conditions, coefficients determined