MODELING OF SANDWICH HETEROGENEOUS PROPELLANT WITH TWO STEPS CHEMICAL KINETICS AND FLUID MECHANICAL EFFECTS | ||||
| ERJ. Engineering Research Journal | ||||
| Article 2, Volume 32, Issue 2, April 2009, Page 119-130 PDF (509.58 K) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/erjm.2009.69397 | ||||
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| Author | ||||
| A. M. Hegab | ||||
| Mechanical Power Engineering Department, Faculty of Engineering, MenouJiya University, Shebin El-Kom, EGyPT | ||||
| Abstract | ||||
| The numerical procedure for the burning of Ammonium Perchlorate (AP) with a Fuel-Binder (Hydroxyl Terminated Polybutadience HTPB) is presented. This model accounts for the two-steps reaction mechanism for the primary diffusion flame between the decomposition products of the Binder (B) and the oxidizer AP and the primary premixed AP flame. Moreover, this current model allowed for the complete coupling between the gas-phase physics, the condensed-phase physics, and the unsteady non-uniform regression of the propellant surface. The parameters used in this model are fitted to experimental data for the combustion of APVHTPB. 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. The Alternating-Direction-Implicit (ADI) solver is employed to solve the full Navier-Stokes equations in the gas phase for the variable density model. The results show the effect of various parameters on the surface propagation speed, flame structure, and the burning surface geomew. A comparison between the computational and experimental results is presented. | ||||
| Keywords | ||||
| Solid rocket propellants; Moving interfaces; Level set method; sandwich propellant; AP/HTPB | ||||
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