First and Second Law Analysis of Future Aircraft Engines
Artikel i vetenskaplig tidskrift, 2014

An optimal baseline turbofan cycle designed for a performance level expected to be available around year 2050 is established. Detailed performance data are given in take-off, top of climb, and cruise to support the analysis. The losses are analyzed, based on a combined use of the first and second law of thermodynamics, in order to establish a basis for a discussion on future radical engine concepts and to quantify loss levels of very high performance engines. In light of the performance of the future baseline engine, three radical cycles designed to reduce the observed major loss sources are introduced. The combined use of a first and second law analysis of an open rotor engine, an intercooled recuperated engine, and an engine working with a pulse detonation combustion core is presented. In the past, virtually no attention has been paid to the systematic quantification of the irreversibility rates of such radical concepts. Previous research on this topic has concentrated on the analysis of the turbojet and the turbofan engine. In the developed framework, the irreversibility rates are quantified through the calculation of the exergy destruction per unit time. A striking strength of the analysis is that it establishes a common currency for comparing losses originating from very different physical sources of irreversibility. This substantially reduces the complexity of analyzing and comparing losses in aero engines. In particular, the analysis sheds new light on how the intercooled recuperated engine establishes its performance benefits.

Författare

Tomas Grönstedt

Chalmers, Tillämpad mekanik, Strömningslära

Mohammad Irannezhad

Chalmers University of Technology

Lei Xu

Chalmers University of Technology

Oskar Thulin

Chalmers, Tillämpad mekanik, Strömningslära

Anders Lundbladh

Chalmers, Tillämpad mekanik, Strömningslära

Journal of Engineering for Gas Turbines and Power

0742-4795 (ISSN) 1528-8919 (eISSN)

Vol. 136 3

Ämneskategorier

Maskinteknik

Rymd- och flygteknik

Farkostteknik

Strömningsmekanik och akustik

Drivkrafter

Hållbar utveckling

Innovation och entreprenörskap

Styrkeområden

Transport

Energi

DOI

10.1115/1.4025727