Combustion properties are classified as follows;rate of heat production, flflame stability, completeness of combustion.
Flame stability has been studied by many workers with stability diagram but there is no clear definition of the rate of heat production in spite of its familiar use.
Author proposed J=cHυ as the rate of heat production where c is the concentration of the fuel in combustible mixture, H (Mcalmiddot;m-3) is the calorific value of the fuel, and υ (m/sec-1) is the flame propagation velocity of the mixture.
The characteristics of J are discussed in this paper.
