%0 Journal Article %A Brewster, M. Quinn %A Chorpening, B. T. %D 2002 %I Begell House %N 1-6 %P 226-235 %R 10.1615/IntJEnergeticMaterialsChemProp.v5.i1-6.240 %T COMBUSTION OF SOLID PROPELLANT SANDWICHES: EFFECT OF BINDER OXYGENATION AND FINITE PECLET NUMBER %U https://www.dl.begellhouse.com/journals/17bbb47e377ce023,76f8e14974df93a8,42805a7230bdc5cb.html %V 5 %X The combustion of AP/HTPB solid propellant sandwiches is investigated experimentally using ultraviolet (310±5 nm) chemiluminescent emission imaging and theoretically using Shvab-Zeldovich theory with finite Peclet number (Pe). Experimentally a thin binder lamina (50−300 μm) is sandwiched between two thick (∼ 1.5 mm) pressed AP layers, forming two AP/binder interfaces. Both pure and oxygenated binders (loaded with fine AP) are considered. Variations in Peclet number and stoichiometry are achieved through varying binder thickness and fine-AP loading. Both experimental and theoretical results show that fine-AP loading has a pronounced effect on the UV-active diffusion flame structure. For the same approximate binder thickness and Pe, adding fine-AP to the binder causes the observed flame intensity and height to decrease and the leading edge of the diffusion flame to shift from the AP region toward the AP/binder interface, in accordance with Shvab-Zeldovich mixing theory. Peclet number also affects diffusion flame structure in a predictable manner for both pure and oxygenated binders: increasing Pe increases the size and intensity of the UV-active diffusion flame. %8 2002-01-01