Utilizing CFD-Based Exergy Calculations in the Design/Optimization of a Complete Aircraft System

Alabi, Kehinde; Ladeinde, Foluso

doi:10.2514/6.2007-1130

Cited by 12 publications

(6 citation statements)

References 12 publications

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“…This model greatly lessens the issues encountered by Reynolds-averaging the entropy transport equation. However, as it has only been used to qualitatively assess the aerodynamic performance of a few unpowered aerospace configurations [12][13][14][15][16], the implementation of this model requires a detailed validation. The code has a few tuning options such as an automatic wake analysis whereby the distance between the body and the transverse plane is gradually increased, the corresponding values of all terms of Eq.…”

Section: Numerical Implementationmentioning

confidence: 99%

“…Far from being an obscure scientific notion, the exergy analysis yields a fundamental definition of loss in an engineering perspective: exergy destruction, or equivalently anergy generation, by irreversible phenomena. In the literature, only a few aerospace configurations have been examined with Reynolds-averaged Navier-Stokes (RANS) flow computations from an exergy/anergy standpoint [12][13][14][15][16]. The authors also investigated unpowered airframe configurations in [17], and the concept of wake ingestion was analyzed in [18].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Exergy-Based Performance Assessment of the NASA Common Research Model

Arntz

Hue

2016

AIAA Journal

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Section: Numerical Implementationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Exergy-Based Performance Assessment of the NASA Common Research Model

Arntz

Hue

2016

AIAA Journal

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“…6. Alabi validated this work using Prandtl-Glauret airfoil theory for a lumped parameter model [5,6].…”

Section: The Oswatitsch Expression For Drag As An Integral Of Entropymentioning

confidence: 81%

“…Where a Reynolds Averaging Naviour Stokes (RANS) approach is used to model the turbulent flow, Adeyinka [1] has included the modelled entropy production into the Navier-Stokes equations. The constitutive form of entropy generation, which is mathematically equivalent to the transport equation for entropy, is given by Alabi [5,6,7,9,8] asṠ…”

Section: The Oswatitsch Expression For Drag As An Integral Of Entropymentioning

confidence: 99%

Adopting exergy analysis for use in aerospace

Hayes

Lone

Whidborne

et al. 2017

Progress in Aerospace Sciences

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Thermodynamic analysis methods, based on an exergy metric, have been developed to improve system efficiency of traditional heat driven systems such as ground based power plants and aircraft propulsion systems. However, in more recent years interest in the topic has broadened to include applying these second law methods to the field of aerodynamics and complete aerospace vehicles. Work to date is based on highly simplified structures, but such a method could be shown to have benefit to the highly conservative and risk averse commercial aerospace sector. This review justifies how thermodynamic exergy analysis has the potential to facilitate a breakthrough in the optimization of aerospace vehicles based on a system of energy systems, through studying the exergy-based multidisciplinary design of future flight vehicles.

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“…[1,2] In aerospace application, systems exergy has mainly been applied to aircraft design, analysis, and optimization. It has been applied in various system contexts including lunar base thermal energy designs [3], aircraft system design [4,5,6,7], analysis, and optimization, aircraft engine analysis [8,9,10,11,12], aircraft environmental control [13], pulsed detonation power devices [14], and hypersonics [1,15]. Interesting comparisons between exergy S balance equation and the Breguet range equation have also been done for aircraft [16].…”

Section: Introductionmentioning

confidence: 99%

System Exergy: System Integrating Physics of Launch Vehicles and Spacecraft

Watson

2018

Journal of Spacecraft and Rockets

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System Engineering of launch vehicles and spacecraft is a challenging and complex under taking. There are many diverse systems which must be integrated and balanced to produce an effective design. This involves a multiplicity of individual engineering relationships that are difficult to integrate and even more difficult to define in a best balance. Integration efforts involve many different approaches from process management to mass balance. But these approaches either do not directly address the launch vehicle or spacecraft performance or require many adjustments to be made to discover a balance. The system integrating physics, derived from the fundamental physics of the system, is the key to identifying a fully integrated system performance measure. Launch vehicles and spacecraft are thermodynamic systems with performance defined by thermodynamic properties. Thus, thermodynamic exergy, which integrates all of the systems thermodynamic properties, provides the system integrating relationships. This provides a basis for determining the most efficient design from among many different configuration options and for guiding the design activities from an integrated system level. This paper explores the current physics relationships used in launch vehicle system design and demonstrates that thermodynamic exergy provides a more explicit and complete approach to system integration.

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Utilizing CFD-Based Exergy Calculations in the Design/Optimization of a Complete Aircraft System

Cited by 12 publications

References 12 publications

Exergy-Based Performance Assessment of the NASA Common Research Model

Exergy-Based Performance Assessment of the NASA Common Research Model

Adopting exergy analysis for use in aerospace

System Exergy: System Integrating Physics of Launch Vehicles and Spacecraft

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