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MFLOP to GFLOP: The Impact on High Fidelity Based Computational AeroelasticityAeroelasticity 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 which can experience complex flow/structure interactions. Even at moderate angles of attack supersonic aircraft can experience vortex induced aeroelastic oscillations. Near transonic speeds buffet associated structural oscillations are possible. Aircraft flying in transonic regime may experience a dip in the flutter speed. 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 supercomputers have reached their limitations both in memory and speed. As a result, parallel computers have evolved to overco me 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. Modifications required in both fluids and structural solvers in order to run efficiently on parallel computers will be discussed. Implementation of moving grids and fluid/structural interface on parallel computers will be discussed.
Document ID
20020050255
Acquisition Source
Ames Research Center
Document Type
Conference Paper
Authors
Guruswamy, Guru P.
(NASA Ames Research Center Moffett Field, CA United States)
VanDalsem, William R.
Date Acquired
August 20, 2013
Publication Date
January 1, 1997
Subject Category
Aircraft Design, Testing And Performance
Meeting Information
Meeting: Super Computing 1997: High Performance Networking and Computing
Location: San Jose, CA
Country: United States
Start Date: November 15, 1997
End Date: November 21, 1997
Funding Number(s)
PROJECT: RTOP 509-10-11
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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