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Applied Aerodynamics

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Computational aerodynamics is a pace setter for the use of major computational facilities in the US and worldwide. It has been estimated that around half of the CPU time used on Department of Defence Supercomputers is for aerodynamic studies, contributing to current and future aircraft projects in areas such as flow control, the high angle of attack regime, and design of re-entry vehicles. Research problems in aerodynamics range from fundamental investigations of turbulent flows using Direct Numerical Simulation and Large Eddy Simulation, through to multidisciplinary analyses of real aircraft configurations at high Reynolds number.

The UK Applied Aerodynamics Consortium (UKAAC) is involved in the later, with work split into themes for helicopters, flexible airframes, engine aeroelastics, vertical landing, and engine-air systems.

One target application is the simulation of a vertical landing aircraft, featuring complex geometry, complex unsteady flow physics due to jet impingement, and a moving mesh as the aircraft descends.

A further target application is the simulation of fluid-structure interaction, demonstrated on the Hawk aircraft (figure 2). This simulation couples the structural deformations predicted by a finite element model with a CFD simulation of the aerodynamics.

 

 

 

C B Allen, Department of Aerospace Engineering, University of Bristol, UK

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