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International Journal of Energetic Materials and Chemical Propulsion
ESCI SJR: 0.28 SNIP: 0.421 CiteScore™: 0.9

ISSN Imprimer: 2150-766X
ISSN En ligne: 2150-7678

International Journal of Energetic Materials and Chemical Propulsion

DOI: 10.1615/IntJEnergeticMaterialsChemProp.v5.i1-6.810
pages 781-790

SPONTANEOUS RADIATION HEAT FEEDBACK MEASUREMENTS IN RADIAL BURNING PROPELLANT SAMPLES

Fabio Cozzi
Dipartimento di Energetica Politecnico di Milano Via La Masa 34 Milan, Italy
G. S. Tussiwand
Dipartimento di Energetica, Politecnico di Milano, Milan, Italy
A. L. Ramaswamy
Dept. of Electrical Engineering, University of Maryland, College Park, MD 20742, USA

RÉSUMÉ

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.


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