RT Journal Article ID 439679ae495d3125 A1 Cozzi, Fabio A1 Tussiwand, G. S. A1 Ramaswamy, A. L. T1 SPONTANEOUS RADIATION HEAT FEEDBACK MEASUREMENTS IN RADIAL BURNING PROPELLANT SAMPLES JF International Journal of Energetic Materials and Chemical Propulsion JO IJEMCP YR 2002 FD 2002-01-01 VO 5 IS 1-6 SP 781 OP 790 K1 solid propellant K1 radiant heat flux from flame K1 micro-calorimeter K1 burning rate AB Spontaneous radiant energy feedback measurements in a radial burning non-aluminized AP composite-propellant grain obtained with a micro-calorimeter, are reported in this paper. The experimental techniques developed for the measurements are described. Measurements performed at 3 different pressures show an increase in the radiant heat flux with pressure. A wavelength averaged propellant extinction factor was measured to evaluate the radiant heat flux opacity of the solid propellant grain. An extinction factor of about 3.7 cm−1 was determined. Finally, the steady burning rate was measured using two different experimental techniques. The first one utilized a video-frame recording system and the second one involved the analysis of the pressure vs. time plots for the burning propellant This experimental work is the first step in a series of studies, the final goal of which is to develop a procedure for the evaluation of the magnitude of the radiant energy feedback from the burning propellant surface and its effects on both the propellant burning rate and the scale factor. PB Begell House LK https://www.dl.begellhouse.com/journals/17bbb47e377ce023,76f8e14974df93a8,439679ae495d3125.html