F. Göbel

This work is intended to identify models that approximate the spectral properties of combustion gases for thermal gas radiation and implement them in the CFD code NSMB. The Weighted Sum of Gray Gases Model (WSGGM) formulated by Smith, Copalle and Johansson as well as the Spectral Line Weighted Sum of Gray Gases Models (SLWSGGM) formulated by Denison are investigated. The theoretical basis of all models is presented, followed by a quantitative comparison in terms of total emissivity predicted by these models. Finally a CFD simulation of the Space Shuttle Main Engine (SSME) Main Combustion Chamber (MCC) is realised with different WSGG models and the SLWSGGM for H2/O2 and CH4/O2 combustion using the CFD codes NSMB and CFX. The investigation of total emissivity reveals a strong limitation of all models in temperature. The CFD simulation confirms the assumption that those models predicting a higher total emissivity also compute a higher radiative heat flux. For the H2/O2 case the models of Smith and Denison provide the best results compared to benchmark data whereas for CH4/O2 Copalles and Denisons models are most suitable. Concerning computational effort, the models by Smith, Copalle and Johansson are identified to be the least time consuming models.

Deutscher Luft- und Raumfahrtkongress 2010

Conference Paper

englisch

21,0 x 29,7 cm, 12 Seiten

Deutscher Luft- und Raumfahrtkongress Tagungsband - Manuskripte, 2010, 2010, ; S.1021-1032; 2010; Deutsche Gesellschaft für Luft- und Raumfahrt - Lilienthal-Oberth e.V., Bonn

NA

Bestellbar

2010