摘要:

AbstractThermal decomposition of ammonium perchlorate (AP) containing different concentrations of a polymeric additive such as polyvinyl pyrrolidone (PVP) has been studied by the technique of differential thermal analysis (DTA). The decomposition products have been identified by means of a mass spectrometer. The results of these two experiments suggest strong interaction between AP and PVP in the solid state.

ISSN:0721-3115    

DOI:10.1002/prep.19780030502

出版商:WILEY‐VCH Verlag GmbH    

年代:1978

数据来源: WILEY

摘要:

AbstractThe combustion zones of doublebase propellant strands and their dependence on pressure were studied by different photographic techniques to get new information on the action of ballistic modifiers. Photos of short exposure time were taken from the foam, dark and flame zones. The extinguished burning surface was studied by optical and scanning electron microscopes. A detailed picture on the production of carbonaceous material on the burning surface was obtained.

ISSN:0721-3115    

DOI:10.1002/prep.19780030503

出版商:WILEY‐VCH Verlag GmbH    

年代:1978

数据来源: WILEY

摘要:

AbstractRésuméOn présente une méthode simple de génération et d repérage d'un signal lumineux. Ce signal est obtenu en ionisant un petit volume d'argon par une onde de choc forte. Il est repéré dans le temps à l'aide d'un signal électrique provoqué par la polarisation d'un matériqu diélectrique traversé par cete même onde de choc. Ce dispositif est utilisé pour déterminer le temps de retard d'un pyromètre optique à co

ISSN:0721-3115    

DOI:10.1002/prep.19780030504

出版商:WILEY‐VCH Verlag GmbH    

年代:1978

数据来源: WILEY

摘要:

AbstractThe object of this paper is to present a method for determining, for a typical metallized solid propellant system, the optimum combination of the reactants so as to arrive at a composition which can yield the maximum specific impulse. A direct approach of this kind for optimization of propellants does not appear to have been attempted so far. The optimization is sought to be carried out by expressing the theoretical specific impulse of the propellant under frozen flow conditions as a function of the different variables involved and maximizing the same, subject to the usual linear and non‐linear constraints of mass balance, mass action, pressure balance, energy conservation and entropy conservation. The gradient projection technique due to Rosen has been adopted for carrying out this optimization. The method was programmed on the IBM 360/Model 44 Computer in FORTRAN IV language and the results of the computations for a typical metallized solid propellant system are presented in the paper. The investigations reveal that the gradient projection technique can be a useful computational device for determining the optimum composition and the corresponding performance parameters of propellant systems containing a large number of reactants and products with or without condensed phase

ISSN:0721-3115    

DOI:10.1002/prep.19780030505

出版商:WILEY‐VCH Verlag GmbH    

年代:1978

数据来源: WILEY

ISSN:0721-3115    

DOI:10.1002/prep.19780030506

出版商:WILEY‐VCH Verlag GmbH    

年代:1978

数据来源: WILEY

ISSN:0721-3115    

DOI:10.1002/prep.19780030501

出版商:WILEY‐VCH Verlag GmbH    

年代:1978

数据来源: WILEY