The Exergy of Lift, and Aircraft Exergy Flow Diagrams

David M. Paulus, Richard A. Gaggioli
2001 Advanced Energy Systems   unpublished
Aside from incidental, auxiliary loads, in level flight the principal load on the aircraft propulsion engine is the power required to provide the continuous lift. To construct an exergy flow diagram for an aircraft — for example, for the purpose of exergy costing — an expression is needed for the exergy delivered to (and by) the wings. That is, an expression is needed for the exergy of lift. In this paper an expression is developed for this quantity, applicable not only in level flight but in
more » ... her modes of flight as well. Then, three exergy flow diagrams are presented for a light aircraft, operating under three conditions: climb, level economy cruise, and level maximum power. The expression for lift exergy and these exergy flow diagrams are relevant to the optimal design of aircraft subsystems [1].
doi:10.1115/imece2001/aes-23644 fatcat:p3afwkjrabcybphj7a5smdttvu