IN the development of jet-engine combustion chambers, in which the rate of heat liberation per unit volume is high, the primary problems are: the mixing of fuel and air, the maintenance of steady combustion in air moving at high overall velocities, and in some types the rapid mixing of excess air with flame gas.
The progress made to date has been by empirical methods, but some general principles have begun to appear as the result of experience, and much research since the war has been aimed at the development of basic design and performance data.
This paper reviews the problems and the progress made in the field of combustion in moving air, and presents some of the results of a five-year program of combustion research.