Consider a cylindrical-shaped solid propellant gas generator (SPGG) used to pressurize a cylindrical liquid propellant t

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Consider A Cylindrical Shaped Solid Propellant Gas Generator Spgg Used To Pressurize A Cylindrical Liquid Propellant T 1 (113.38 KiB) Viewed 47 times

Consider a cylindrical-shaped solid propellant gas generator (SPGG) used to pressurize a cylindrical liquid propellant tank as shown in the sketch below. Assume solid propellant characteristics (i.e., Pp, Tc, y, C*, r = aP") and the liquid tank geometry (i.e., L, D) are known. In addition, it is desired to maintain a constant ullage pressure, Pu, over the firing duration, th. You may neglect the initial ullage volume. Presume that you have selected a P value. Derive an equation for the: Gas generator throat diameter, Dt (in terms of C*, D, L, Pu, PC, R, TC, V, and to) • Solid propellant grain diameter, Dgg (in terms of Pu, Pc, D, L, R, TC, V. pp and Lgg) You may assume isentropic gas flow between SPGG and the liquid propellant tank. Ogg Lgg 1 solid propellant gas generator with Pc, Tc, r end burning Pu DU Piston Liquid propellant tank L D Const. R known To pump