Non-catalyzed propellant

Fig. 6.22 shows a typical set of burning rates for catalyzed and non-catalyzed NC-NG double-base propellants. The burning rate of the non-catalyzed propellant composed of 53 % NC, 40% NG, and 7 % DEP is seen to increase linearly with increasing pres sure in an In r versus In p plot. When the propellant is catalyzed with a com-... 

Fig. 7.45 shows a set of flame photographs of HMX-GAP propellants with and without catalysts. The luminous flame front of the non-catalyzed propellant is almost attached the burning surface at 0.5 MPa (a). When the propellant is catalyzed, the luminous flame is distended from the burning surface at the same pressure (b). Since the heat flux transferred back from the gas phase and the heat of reaction at... 

Fig. 8.22 The luminous flame front of the platonized propellant approaches the burning surface more rapidly than that of the non-catalyzed propellant when the pressure is increased in the plateau-burning pressure region.

Fig. 8.24 Catalyst activity in the fizz zone decreases rapidly in the plateau region and becomes negative above the pressure region in which the burning rate of the catalyzed propellant is lower than that of the non-catalyzed propellant.

The effective overall order of the fizz zone reaction, k, is determined to be zero for plateau burning, and approximately 1.4for super-rate burning. The reaction order for the non-catalyzed propellant is also determined to be approximately 1.7, that is, nearly equal to the order of a conventional gas-phase reaction. 

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