The flow inside a model gas turbine combustor:calculations

• Tipo: Artigo em Revista Científica Internacional
• Data: 1993

Autores

McGuirk, JJ (Autor) Outra; José Laginha Palma (Autor) FEUP

Revista

Título: Journal of Engineering for Gas Turbines and Power

Vol. 115

Páginas: 594-602

ISSN: 0742-4795

Editora: ASME

Indexação

Scopus - 36 Citações

Outras Informações

ID Authenticus: P-008-P1H

Abstract (EN): The present study assesses the ability of the K-e turbulence model to calculate the flow inside gas turbine combustors. Results of calculations using a cylindrical system of coordinates, hybrid differencing, a mesh with about 40,000 nodes are compared with velocity measurements of the flow inside a perspex model of con-type gas turbine combustor. The larger discrepancies between measurements and predictions were found in the primary region. The complexity of the flow near the primary jet impingement led to underprediction of the maximum negative axial velocity and turbulence kinetic energy by about 35 and 20 percent, respectively. The calculated results exhibited higher levels of momentum diffusion compared to the experiments and did not show the tow counter rotating vortices created between the primary jets; no qualitative agreement with the azimuthal velocity downstream of the primary jet could be achieved. Despite these deficiencies, the model gave acceptable results in other regions of the combustor and correct prediction of the main features of the combustor flow was possible.

Idioma: Inglês

Tipo (Avaliação Docente): Científica