A modified vortex generator model and its application to complex aerodynamic flows


  • Jirasek Adam

Publish date: 2004-01-01

Report number: FOI-R--1204--SE

Pages: 33

Written in: English


This report describes the development and verification of a vortex generator model for the FOI CFD code Edge. The proposed vortex generator model removes the need to physically mesh the vortex generator. Instead the appropriate lift force normal to the local flow direction is added to the system of Navier-Stokes equations. The source term is based on an existing model in which the local force in the source term is dependent on local flow quantities and vortex generat or characteristics. Several main issues were kept in focus during the development of the vortex generator model; the model must be able to treat many vortex generators as accurately as possible; the model should not contain a large number of unknowns which must be supplied by the user; the model should, to a certain extent, be grid and model constant independent and last but not least, the model must be user friendly. The proposed vortex generator model was implemented and tested for flow over a flat plate with single a sub-boundary layer vortex generator and for the RAE M2129 S-duct with four different vortex generator installations. The vortex generator model is easy to use, does not require a great deal of user input and is able to treat different types of vortex generators.