Development and Validation of a Discrete Vortex Method for the Prediction of Separated Incompressible Flows Around Bluff Bodies. G.U. Aero Report 9622

Taylor, I.J. (1996) Development and Validation of a Discrete Vortex Method for the Prediction of Separated Incompressible Flows Around Bluff Bodies. G.U. Aero Report 9622. Technical Report. Department of Aerospace Engineering, University of Glasgow.

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Abstract

A vortex method has been developed at the Department of Aerospace Engineering, University of Glasgow, for predicting separated, incompressible flow around two dimensional bodies. The method is a Lagrangian technique, with the vorticity field discretised into a series of particles, that are then tracked in the flow through time. The Biot-Savart law is used to calculate the velocity of each particle and random walks are employed to model flow diffusion. The method has successfully been validated against numerous test cases for aerofoils, however, no significant work has been carried out on validating the method for bluff body calculations, especially bodies with sharp comers. This report presents the necessary modifications to the method, that enable reliable calculations to be made for flow fields around bluff bodies. Results of some calculations are presented against experimental data for simple bluff body geometries. Qualitatively, the results are quite encouraging, although these preliminary calculations have highlighted areas of modelling that need to be addressed in future work to improve the level of agreement with experimental data. Also presented in the report are details of a new speed up routine to improve the efficiency of the calculation.

Item Type:Research Reports or Papers (Technical Report)
Status:Published
Glasgow Author(s) Enlighten ID:Taylor, Dr Ian
Authors: Taylor, I.J.
College/School:College of Science and Engineering > School of Engineering > Aerospace Sciences
Publisher:Department of Aerospace Engineering, University of Glasgow
Copyright Holders:Copyright © 1996 Department of Aerospace Engineering, University of Glasgow
Publisher Policy:Reproduced with the permission of the Department

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