Analysis of Energy Utilization and Losses for Jet-Propelled Vehicles

The global control volume-based energy utilization balance for an aerospace vehicle is extended to allow for the analysis of jet-propelled vehicles. The methodology is first developed for analyzing the energy utilization and entropy generation characteristics of jet engines without airframe consider...

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Autores principales:	Mohammad Abbas, David W. Riggins
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	entropy exergy availability losses propulsion performance Motor vehicles. Aeronautics. Astronautics TL1-4050
Acceso en línea:	https://doaj.org/article/577ae5a55782425b88f8f416c8d05475
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id	oai:doaj.org-article:577ae5a55782425b88f8f416c8d05475
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spelling	oai:doaj.org-article:577ae5a55782425b88f8f416c8d054752021-11-25T15:57:43ZAnalysis of Energy Utilization and Losses for Jet-Propelled Vehicles10.3390/aerospace81103422226-4310https://doaj.org/article/577ae5a55782425b88f8f416c8d054752021-11-01T00:00:00Zhttps://www.mdpi.com/2226-4310/8/11/342https://doaj.org/toc/2226-4310The global control volume-based energy utilization balance for an aerospace vehicle is extended to allow for the analysis of jet-propelled vehicles. The methodology is first developed for analyzing the energy utilization and entropy generation characteristics of jet engines without airframe considerations. This methodology, when combined with separate energy utilization analysis for an unpowered airframe, allows for the assessment of a powered vehicle. Wake entropy generation for a powered vehicle is shown to be the summation of the wake entropy generation associated with the propulsion system (no airframe) and the unpowered airframe. The fundamental relationship between overall entropy generation and the flight conditions required for maximum range and endurance of a powered vehicle are also derived. Example energy utilization results obtained for a modeled turbojet engine in off-design operation are provided; wake and engine component entropy generation characteristics are directly related to engine operation and flight conditions. This engine model is then integrated with a legacy (twin-engine) Northrop F-5E Tiger II airframe. The overall entropy generation temporal rate for the vehicle is minimized, as predicted by our analysis, at flight conditions corresponding to maximum endurance. For flight conditions corresponding to maximum range, the overall entropy spatial rate is minimized.Mohammad AbbasDavid W. RigginsMDPI AGarticleentropyexergyavailabilitylossespropulsionperformanceMotor vehicles. Aeronautics. AstronauticsTL1-4050ENAerospace, Vol 8, Iss 342, p 342 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	entropy exergy availability losses propulsion performance Motor vehicles. Aeronautics. Astronautics TL1-4050
spellingShingle	entropy exergy availability losses propulsion performance Motor vehicles. Aeronautics. Astronautics TL1-4050 Mohammad Abbas David W. Riggins Analysis of Energy Utilization and Losses for Jet-Propelled Vehicles
description	The global control volume-based energy utilization balance for an aerospace vehicle is extended to allow for the analysis of jet-propelled vehicles. The methodology is first developed for analyzing the energy utilization and entropy generation characteristics of jet engines without airframe considerations. This methodology, when combined with separate energy utilization analysis for an unpowered airframe, allows for the assessment of a powered vehicle. Wake entropy generation for a powered vehicle is shown to be the summation of the wake entropy generation associated with the propulsion system (no airframe) and the unpowered airframe. The fundamental relationship between overall entropy generation and the flight conditions required for maximum range and endurance of a powered vehicle are also derived. Example energy utilization results obtained for a modeled turbojet engine in off-design operation are provided; wake and engine component entropy generation characteristics are directly related to engine operation and flight conditions. This engine model is then integrated with a legacy (twin-engine) Northrop F-5E Tiger II airframe. The overall entropy generation temporal rate for the vehicle is minimized, as predicted by our analysis, at flight conditions corresponding to maximum endurance. For flight conditions corresponding to maximum range, the overall entropy spatial rate is minimized.
format	article
author	Mohammad Abbas David W. Riggins
author_facet	Mohammad Abbas David W. Riggins
author_sort	Mohammad Abbas
title	Analysis of Energy Utilization and Losses for Jet-Propelled Vehicles
title_short	Analysis of Energy Utilization and Losses for Jet-Propelled Vehicles
title_full	Analysis of Energy Utilization and Losses for Jet-Propelled Vehicles
title_fullStr	Analysis of Energy Utilization and Losses for Jet-Propelled Vehicles
title_full_unstemmed	Analysis of Energy Utilization and Losses for Jet-Propelled Vehicles
title_sort	analysis of energy utilization and losses for jet-propelled vehicles
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/577ae5a55782425b88f8f416c8d05475
work_keys_str_mv	AT mohammadabbas analysisofenergyutilizationandlossesforjetpropelledvehicles AT davidwriggins analysisofenergyutilizationandlossesforjetpropelledvehicles
_version_	1718413380276977664

Analysis of Energy Utilization and Losses for Jet-Propelled Vehicles

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