A Unified Methodology for Aerospace Systems Integration Based on Entropy and the Second Law of Thermodynamics: Aerodynamics Assessment

Abstract

We present a viscous computational fluid dynamics (CFD) simulation over two finite twisted wings configured so as to give a theoretically predicted elliptic and parabolic lift distributions. Local surface integration and farfield methods were used to calculate the induced drag. The objective of this project is to relate work-potential losses (exergy destruction) to the aerodynamics forces in an attempt to validate a new design methodology based on the second law of thermodynamics. Exergy destruction for the entire flow field was determined from the CFD results. CFD results show that the parabolic case produces smaller induced drag and entropy generation rates than the elliptic case. The entropy generation rates for both cases deviated significantly from the expected values, revealing the inaccuracy of entropy generation rate prediction for a turbulent flow. This project, however, set up a basis in terms of analysis methodology, from which the future work will follow.

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Document Details

Document Type
Technical Report
Publication Date
Aug 01, 2004
Accession Number
ADA437035

Entities

People

  • Jason Stewart
  • Jose A. Camberos
  • Richard Figliola
  • Shohei Nomura

Organizations

  • Air Force Research Laboratory

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Aerodynamics
  • Air Force Research Laboratories
  • Aircrafts
  • Boundary Layer
  • Computational Fluid Dynamics
  • Computational Science
  • Flow
  • Flow Fields
  • Fluid Dynamics
  • Fluid Flow
  • Geometry
  • Hydrodynamics
  • Simulations
  • Skin Friction
  • Three Dimensional
  • Turbulent Flow
  • Viscous Flow

Readers

  • Adaptive Control and Estimation with Uncertainty in Dynamic Systems.
  • Combustion and Flow Dynamics.
  • Computational Modeling and Simulation

Technology Areas

  • Space