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Fluid/Structure Interaction Studies of Aircraft Using High Fidelity Equations on Parallel ComputersAbstract Aeroelasticity which involves strong coupling of fluids, structures and controls is an important element in designing an aircraft. Computational aeroelasticity using low fidelity methods such as the linear aerodynamic flow equations coupled with the modal structural equations are well advanced. Though these low fidelity approaches are computationally less intensive, they are not adequate for the analysis of modern aircraft such as High Speed Civil Transport (HSCT) and Advanced Subsonic Transport (AST) which can experience complex flow/structure interactions. HSCT can experience vortex induced aeroelastic oscillations whereas AST can experience transonic buffet associated structural oscillations. Both aircraft may experience a dip in the flutter speed at the transonic regime. For accurate aeroelastic computations at these complex fluid/structure interaction situations, high fidelity equations such as the Navier-Stokes for fluids and the finite-elements for structures are needed. Computations using these high fidelity equations require large computational resources both in memory and speed. Current conventional super computers have reached their limitations both in memory and speed. As a result, parallel computers have evolved to overcome the limitations of conventional computers. This paper will address the transition that is taking place in computational aeroelasticity from conventional computers to parallel computers. The paper will address special techniques needed to take advantage of the architecture of new parallel computers. Results will be illustrated from computations made on iPSC/860 and IBM SP2 computer by using ENSAERO code that directly couples the Euler/Navier-Stokes flow equations with high resolution finite-element structural equations.
Document ID
20020023237
Document Type
Conference Paper
Authors
Guruswamy, Guru (NASA Ames Research Center Moffett Field, CA United States)
VanDalsem, William
Date Acquired
August 20, 2013
Publication Date
January 1, 1994
Subject Category
Aircraft Design, Testing and Performance
Meeting Information
ASME Symposium on Industrial Applications of Parallel Computing(San Francisco, CA)
Funding Number(s)
PROJECT: RTOP 509-10-11
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.