Geodesic
Numerical Studies of the Influence of the Nature of the In-Chamber Flow on the Initial Period of Operation of the Gas Generator
Russian journal of nonlinear dynamics, Tome 20 (2024) no. 3, pp. 371-384.

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The ignition of a fuel pellet in a gas generator chamber is a time-consuming complex physico- chemical process. During the ignition of the checker, the operating conditions of the device differ significantly from the conditions of its operation in the main area of operation. In particular, an important characteristic of the initial stage is the pattern of flame propagation over the surface of the fuel. A computational algorithm for modeling unsteady turbulent flows of compressible viscous gas based on numerical integration of unsteady equations obtained using physical con- servation laws was used to study the vortex flow of gas in the gas generator path and the ignition process of the fuel block. The method used a system of equations written in a cylindrical coor- dinate system. The computational algorithm is based on a modified flow vector splitting scheme (Steger – Warming scheme). The algorithm has the 2nd order of accuracy in space. The obtained results of numerical simulation of the gas flow in the gas generator allow us to investigate the patterns of development of the ignition process of the fuel block in time, depending on the nature of the gas flow in the combustion chamber.
Keywords: vortex flow, large eddy simulation, computational fluid dynamics
Mots-clés : turbulence 
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A. M. Lipanov; A. A. Shumikhin; A. I. Karpov. Numerical Studies of the Influence of the Nature of the In-Chamber Flow on the Initial Period of Operation of the Gas Generator. Russian journal of nonlinear dynamics, Tome 20 (2024) no. 3, pp. 371-384. http://geodesic.mathdoc.fr/item/ND_2024_20_3_a3/

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