An Experimental Study on the Effects of Air Distributions in the High Intensity Combustion Chamber : 2nd Report, Concentration Profiles in the Combustion Chamber

Abstract

A series of the combustion experiments has been made to study the effects of air distributions on the combustion processes in the high intensity combustion chamber of a jet propulsion engine using a box-type combustion chamber. The effects of air distributions on the combustion chamber performances, the flow patterns and the temperature distributions were examined in the first report. In the present experiment, the concentration profiles of various stable species in the combustion chamber were determined using a quartz sampling probe and a gas chromatograph. From the vertical and the horizontal concentration profiles, it is found that the main reaction zone exists near the inner edge of the fuel spray cone. The axial concentration profiles are changed greatly according to air distributions, and as the primary air flow increases, the concentrations of the combustion products increase and also they become uniform in the recirculation zone.