Proposed System-Level Multidisciplinary Analysis Technique Based on Exergy Methods

Moorhouse, David J.

doi:10.2514/2.3088

Cited by 41 publications

(20 citation statements)

References 3 publications

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“…new methods are needed. A new method that is being developed follows previous work (6) , that considers a vehicle as a device to accomplish work and all components can be optimised to minimise energy consumption at the system level. It is envisioned to be a multidisciplinary research program that strives to understand the energy relationship between aerodynamics, structures, control, actuator power requirements, sensor integration and all other components.…”

Section: Design Challengesmentioning

confidence: 99%

Benefits and design challenges of adaptive structures for morphing aircraft

et al. 2006

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The purpose of this paper is to discuss the future of adaptive structures leading towards the concept of a fully morphing aircraft configuration.First, examples are shown to illustrate the potential system-level mission benefits of morphing wing geometry. The challenges of design integration are discussed along with the question of how to address the optimisation of such a system. This leads to a suggestion that non-traditional methods need to be developed. It is suggested that an integrated approach to defining the work to be done and the energy to be used is the solution. This approach is introduced and then some challenges are examined in more detail. First, concepts of mechanisation are discussed as ways to achieve optimum geometries. Then there are discussions of non-linearities that could be important. Finally, the flight control design challenge is considered in terms of the rate of change of the morphing geometry. The paper concludes with recommendations for future work.

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Section: Design Challengesmentioning

confidence: 99%

Benefits and design challenges of adaptive structures for morphing aircraft

et al. 2006

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“…There are a number of studies available in the open literature for exergy and exergoeconomic analyses as a tool, such as spark ignition internal combustion engines (Zhecheng, Brun, and Badin 1991;Rakopoulos 1993;Kopac and Kokturk 2005;Abu-Nada et al 2007;Sezer and Bilgin 2008a,b;Ameri et al 2010), the aerospace industry (Bejan and Siems 2001;Etelen and Rose 2001;Roth and Mavris 2001;Figliola, Tipton, and Li 2003;Moorhouse 2003;Rosen and Etelen 2004;Leo and Pérez-Grande 2005;Pellegrini, Gandolfi, and Silva 2007;Turgut, Karakoc, and Hepbasli 2007;Periannan, von Spakovsky, and Moorhouse 2008;Turgut, Karakoc, and Hepbasli 2009a;Turgut et al 2009b;Tona et al 2010), and other systems such as power plants, wind turbine, cement plants, heat pumps, etc. (Kim et al 1998;Bilgen 2000;Kwon, Kwak, and Oh 2001;Cziesla, Tsatsaronis, Gao 2006;Zaleta et al 2007;Oktay and Dincer 2009;Ozgener, Ozgener, and Dincer 2009;Sogut, Oktay, and Hepbasli 2009;Ahmadi and Dincer 2010;Sogut, Oktay, and Karakoc 2010a;Sogut et al 2010b;Coskun, Oktay, and Dincer 2011;Gungor, Erbay, and Hepbasli 2011).…”

Section: Introductionmentioning

confidence: 99%

Exergoeconomic Environmental Optimization of Piston-Prop Aircraft Engines

Altuntaş

Karakoç

Hepbaşlı

2014

International Journal of Green Energy

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In this study, exergy, exergoeconomic, exergoenvironmental analyses, and exergoeconomic environmental optimization are applied to a four-cylinder, spark ignition, naturally aspirated and air-cooled piston-prop aircraft engine in the cruise phase of flight for the first time to the best of the authors`knowledge. Here, three piston-prop aircraft engine parameters (altitude, air-fuel ratio (AF), and rated power setting (PS)) are selected for optimization purposes. All exergy, exergoeconomic, and exergoenvironmental values are calculated first. These values are then optimized to find the best results of all analyses. The best altitude, AF ratio, and PS values are finally found while the maximum exergy efficiency, the minimum product specific environmental impact, and the minimum average unit fuel exergy cost are obtained. The best results of optimization indicated that the maximum exergy efficiency varied between 19.54% and 19.80%, the minimum unit fuel exergy cost ranged from 126.30 $/GJ to 127.23 $/GJ, and the minimum specific environmental impact of production was in the range of 8.70-9.59 mPts/MJ. Based on the results obtained, for ensuring the optimum conditions, the low AF ratios and the low-altitude flight at high rated power settings have to be selected.

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“…Also, it is agreed that there must be a common basis to compare different alternatives in aircraft design, especially when developing new systems. Thus, the use of exergy analysis might provide new information in which a comparative study could rely on, since trade-off studies are faulty in evaluating new systems, as they present lack of information [1][2][3][4].…”

Section: Introductionmentioning

confidence: 99%