BURNING VELOCITIES OF HYDROGEN-AIR MIXTURES

Laminar and turbulent burning velocities of hydrogen-air mixtures have been determined in a 17-L vessel using the double-kernel technique for a range of hydrogen concentrations between 9% and 70% by volume. Over the range of mixtures investigated, simple empirical correlations yield laminar burning velocities that are in good agreement with those measured. A turbulent-burning-velocity correlation that includes the flame-generated turbulence produces burning velocities in good agreement with the values measured experimentally. The data and correlations for the hydrogen burning velocity are used in models to predict hydrogen combustion behaviour in enclosures containing hydrogen-air-diluent mixtures and in combustion systems that employ hydrogen as the fuel.