Browse Publications Technical Papers 2000-01-1423
2000-01-15

INVESTIGATION ON COMBUSTION BEHAVIOR OF EXTREMELY LEAN MIXTURES IN A CLOSED BOMB LIKE A GASOLINE ENGINE 2000-01-1423

From the viewpoint of energy saving and air pollution prevention which are needed for development of internal combustion engines, experiments have been carried out to elucidate the true combustion bahavior of extremely lean mixtures in a closed bomb by using the microgravity techniques. Microgravity conditions established in a falling assembly enables the flame propagation and the measurement in lean-limit states. The oscillatory nature of flame propgation appeared in very lean mixtures of propane-air may be explained in term of Lewis number which is less than unity. Turbulence is shown to be ineffective in enhanching the burning velocities and indeed may cause extinction in very lean mixtures.

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