Defining the Ecological Coefficient of Performance for an Aircraft Propulsion System
-
Yasin Şöhret
Abstract
The aircraft industry, along with other industries, is considered responsible these days regarding environmental issues. Therefore, the performance evaluation of aircraft propulsion systems should be conducted with respect to environmental and ecological considerations. The current paper aims to present the ecological coefficient of performance calculation methodology for aircraft propulsion systems. The ecological coefficient performance is a widely-preferred performance indicator of numerous energy conversion systems. On the basis of thermodynamic laws, the methodology used to determine the ecological coefficient of performance for an aircraft propulsion system is parametrically explained and illustrated in this paper for the first time. For a better understanding, to begin with, the exergy analysis of a turbojet engine is described in detail. Following this, the outputs of the analysis are employed to define the ecological coefficient of performance for a turbojet engine. At the end of the study, the ecological coefficient of performance is evaluated parametrically and discussed depending on selected engine design parameters and performance measures. The author asserts the ecological coefficient of performance to be a beneficial indicator for researchers interested in aircraft propulsion system design and related topics.
Acknowledgements
The author thanks the reviewers for their positive and constructive comments and contribution to the improvement of the quality of the paper.
Nomenclature
- AC
Compressor section of the turbojet
- CC
Combustion chamber section of the turbojet
- GT
Gas turbine section of the turbojet
- cp
Specific heat capacity under constant pressure (kJ.kg−1.s−1)
- e
Specific energy (kJ.kg−1)
- f
Air to fuel ratio
- ECO
Ecological performance function
- ECOP
Ecological coefficient of performance
- Ex
Exergy (kJ)
- ex
Specific exergy (kJ.kg−1)
- h
Specific enthalpy (kJ.kg−1)
- IN
Inlet section of the turbojet engine
- LHV
Lower heating value (kJ kg−1)
- m
Mass flow (kg)
- FT
Thrust
- Q
Heat flux (kJ)
- SFC
Specific fuel consumption (g.kN−1.s−1)
- s
Specific entropy
- T
Temperature (K)
- t
Time (s)
- V
Velocity (m.s−1)
- W
Work (kJ)
- Greek letters
Efficiency
Exergy efficiency
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© 2018 Walter de Gruyter GmbH, Berlin/Boston
Articles in the same Issue
- Frontmatter
- Jet Engines – The New Masters of Advanced Flight Control
- Prediction of Film Cooling Effectiveness on a Gas Turbine Blade Leading Edge Using ANN and CFD
- Sustainability Metrics of a Small Scale Turbojet Engine
- Coupling Network Computing Applications in Air-cooled Turbine Blades Optimization
- Performance Enhancement of One and Two-Shaft Industrial Turboshaft Engines Topped With Wave Rotors
- Semi-Immersive Virtual Turbine Engine Simulation System
- A Novel Modeling Method for Aircraft Engine Using Nonlinear Autoregressive Exogenous (NARX) Models Based on Wavelet Neural Networks
- Defining the Ecological Coefficient of Performance for an Aircraft Propulsion System
- Investigation on the Accuracy of Superposition Predictions of Film Cooling Effectiveness
- Computational Investigations in Rectangular Convergent and Divergent Ribbed Channels
Articles in the same Issue
- Frontmatter
- Jet Engines – The New Masters of Advanced Flight Control
- Prediction of Film Cooling Effectiveness on a Gas Turbine Blade Leading Edge Using ANN and CFD
- Sustainability Metrics of a Small Scale Turbojet Engine
- Coupling Network Computing Applications in Air-cooled Turbine Blades Optimization
- Performance Enhancement of One and Two-Shaft Industrial Turboshaft Engines Topped With Wave Rotors
- Semi-Immersive Virtual Turbine Engine Simulation System
- A Novel Modeling Method for Aircraft Engine Using Nonlinear Autoregressive Exogenous (NARX) Models Based on Wavelet Neural Networks
- Defining the Ecological Coefficient of Performance for an Aircraft Propulsion System
- Investigation on the Accuracy of Superposition Predictions of Film Cooling Effectiveness
- Computational Investigations in Rectangular Convergent and Divergent Ribbed Channels
