Utilize este identificador para referenciar este registo: http://hdl.handle.net/10400.21/672
Título: Simple thermodynamics of jet engines
Autor: Patrício, Pedro Manuel Alves
Tavares, José M.
Data: Ago-2010
Editora: Amer Assoc Physics Teachers Amer Inst Physics
Citação: Patrício P, Tavares J M. Simple thermodynamics of jet engines. American Journal of Physics. 2010; 78 (8): 809-814.
Relatório da Série N.º: 8;
Resumo: We use the first and second laws of thermodynamics to analyze the behavior of an ideal jet engine. Simple analytical expressions for the thermal efficiency, the overall efficiency, and the reduced thrust are derived. We show that the thermal efficiency depends only on the compression ratio r and on the velocity of the aircraft. The other two performance measures depend also on the ratio of the temperature at the turbine to the inlet temperature in the engine, T-3/T-i. An analysis of these expressions shows that it is not possible to choose an optimal set of values of r and T-3/T-i that maximize both the overall efficiency and thrust. We study how irreversibilities in the compressor and the turbine decrease the overall efficiency of jet engines and show that this effect is more pronounced for smaller T-3/T-i.
Peer review: yes
URI: http://hdl.handle.net/10400.21/672
ISSN: 002-9505
Aparece nas colecções:ISEL - Física - Artigos

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