Abstract

In studying the combustion of double base (D. B) propellants,a coulometric nitrogen oxides detector, differential scanning calorimetry(DSC) and a long-focus microphotographic camera are used to determine respectively the amounts of NO 2 NO, the dissociation heat Q, the activation energy E and the dark zone thickness L. In the combustion process of the double base propellant, there must be a gas-soild hetero- geneous reaction between NO 2 . and the propellant, and this reaction is an important step affecting the combustion rate of the propellant. This reaction is catalyzed by the rate increasing catalysts. As a result, the burning rate can be increased greatly. Inhibition of such a reaction by plateau catalysts is one of the factors that produce the plateau. Both sets of catalysts are effective in the dark zone, which have no remarkable effect on the burning rate.

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