Title: Aerospace systems and exergy analysis: applications and methodology development needs

Authors: Marc A. Rosen, Jason Etele

Addresses: Faculty of Engineering and Applied Science, University of Ontario Institute of Technology, 2000 Simcoe Street North, Oshawa, Ontario, L1H 7K4, Canada. ' Department of Mechanical and Aerospace Engineering, Carleton University, 1125 Colonel By Drive, Ottawa, Ontario, K1S 5B6, Canada

Abstract: Exergy analysis permits meaningful efficiencies, which are a measure of approach to ideality, to be evaluated, and the sources, causes and locations of thermodynamic losses to be determined. Yet, applications of exergy to aerospace engines have been relatively limited. Three main activities are reported: 1. differences are discussed between terrestrial and aerospace applications of exergy, due to a varying operating environment and the ejection of exhaust gases with high exergy for an aerospace engine; 2. exergy analysis is applied to a turbojet engine during a typical flight; 3. the general needs are identified and discussed for research into improving thermodynamic efficiencies using exergy methods for aerospace applications. The results are expected to assist aerospace-engine design work, where exergy methods provide a more comprehensive assessment of performance, allowing an engine to be better tailored to the types of flights and operating conditions it will encounter.

Keywords: aerospace engines; efficiency; exergy analysis; reference environment; thermodynamics; turbojet engines; exhaust gases; thermodynamic efficiencies; engine design.

DOI: 10.1504/IJEX.2004.005786

International Journal of Exergy, 2004 Vol.1 No.4, pp.411 - 425

Published online: 05 Dec 2004 *

Full-text access for editors Access for subscribers Purchase this article Comment on this article