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Modelling of a solid fuel combustion chamber of a ramjet using a multi-block domain decomposition techique. (English) Zbl 0936.76038

A computer code aimed at the simulation of physical phenomena occuring in the solid fuel combustion chamber of a ramjet is extended to accommodate multi-block grids. The mathematical model is based on the numerical solution of governing equations for mass, momentum, energy and transport equations for scalar quantities. The \(k-\varepsilon\) model and the conserved scalar/prescribed probability density function formalism are employed. Heat and mass transfer at the walls are calculated using the wall functions modified to account for porous walls. The multi-block method allows discontinuous grid lines along the interblock boundaries, and transfer of data between neighbouring blocks satisfies flux conservation. The implementation of the multi-block domain decomposition technique is demonstrated for a turbulent isothermal flow through a pipe with a sudden expansion, and for a solid fuel combustion chamber of a ramjet.

MSC:

76M12 Finite volume methods applied to problems in fluid mechanics
76V05 Reaction effects in flows
76F60 \(k\)-\(\varepsilon\) modeling in turbulence
65M55 Multigrid methods; domain decomposition for initial value and initial-boundary value problems involving PDEs
80A25 Combustion
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