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[9000356.] رقم البحث : 9000356 - |
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EXPERIMENTAL AND NUMERICAL INVESTIGATIONS FOR THE COMBUSTION OF SELECTED COMPOSITE SOLID PROPELLANT / |
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قطاع الدراسات الهندسية / الهندسه الكهربائيه |
| تخصص البحث : الهندسه الكهربائيه |
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Engineering Research Journal \ / Vol. 35, No. 3 - July 2012 |
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أحمد محمد حجاب |
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Composite Propellant, Gas/solid Phases, Heterogeneous Propellant, AP/HTPB, Level Set Method. |
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In this study, numerical and experimental study for the packing and burning of composite solid propellant is presented. A mathematical model which describes the unsteady burning of a heterogeneous propellant by simultaneously solving the combustion fields in the gas phase and the thermal field in the solid phase with appropriate jump condition across the gas/solid interface is developed. The gas-phase kinetics is represented by a two-step reaction mechanism for the primary premixed flame and the primary diffusion flame between the decomposition products of the HTPB and the oxidizer AP. The propagation of the unsteady non-planer regression surface is described, using the Essentially-Non-Oscillatory (ENO) scheme with the aid of the level set strategy. Moreover, an experimental investigation for similar sample of 200 microns AP particles with 50 microns AP particles imbedded in a matrix of HTPB is performed. The results show that the large AP particle diameter has a great effect on the combustion surface deformation and on the burning rate as well. Moreover, the effect of various parameters on the surface propagation speed, flame structure, and the burning surface geometry is obtained. |
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