%0 Journal Article %A Paravan, Christian %A Manzoni, M. %A Rambaldi, G. %A De Luca, Luigi T. %D 2013 %I Begell House %K hydroxyl-terminated polybutadiene (HTPB), ballistics, pressure, model, radiation, transient, shutdown %N 5 %P 385-410 %R 10.1615/IntJEnergeticMaterialsChemProp.2013005756 %T ANALYSIS OF QUASI-STEADY AND TRANSIENT BURNING OF HYBRID FUELS IN A LABORATORY-SCALE BURNER BY AN OPTICAL TECHNIQUE %U https://www.dl.begellhouse.com/journals/17bbb47e377ce023,6af418df1a9e0455,636dfc1b2024eb46.html %V 12 %X Burning of hydroxyl-terminated polybutadiene in gaseous oxygen is investigated using a time-resolved optical technique. Combustion tests are performed in a two-dimensional radial micro-burner under quasi-steady and forced transient operating conditions. Under quasi-steady operating conditions, the high initial regression rate at the beginning of the run is followed by a smooth monotonic decrease as combustion proceeds. This behavior is captured by a purposely developed regression rate simulation model. Under forced transient operating conditions, for oxidizer mass flow throttling down, solid fuel exhibits a non-monotonic regression rate response. Earlier phases of the transient are characterized by a noticeable regression rate decrease followed by faint oscillations. %8 2013-10-03