Naslov
Modelling of a Solid Fuel Combustion Chamber of a Ramjet Using a Multi-block Domain Decomposition Technique

Autori
Coelho, Pedro J. ; Duić, Neven ; Lemos, Carlos ; Carvalho, Maria Graça

Izvornik
Aerospace science and technology (1270-9638) 2 (1998), 2; 107-119

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
Solid Fuel Combustion; Ramjets; Multi-block

Sažetak
A computer code aimed at the simulation of the physical phenomena occuring in the solid fuel combustion chamber of a ramjet was extended to accommodate multi-block grids. The mathematical model is based on the numerical solution of the governing equations for mass, momentum, energy and transport equations for scalar quantities. The k-e 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 of Chieng and Launder 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. In this case, the evolution of the local regression rate along the wall is in good qualitative agreement with the data, but quantitative disagreement was found, mainly due to the shortcomings of the turbulence model employed.

Izvorni jezik
Engleski

Znanstvena područja
Strojarstvo

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