So as part of my job on the le mans team im asked my opinion on some aero bits and bobs. i also have access to some cfd software and Craig and myself have been talking about rear wings and endplates in particular.
i havnt got a model of any of the wings on our cars or a model of a celica but i have got models of out le mans car wing so i thought i would play around with that...
it is a two element wing with a mandetory gurney flap on the trailing edge.
i ran a simulation of the wing in free air flow (No car body in front) to get a pure assesment of what the wing does at an air speed of 30m/s (67mph) with out any end plates.
here are the screen shots:
Picture1
Top view of the wing with surface pressures
Picture 2
underside view with surface pressures
Picture 3
top view with flow lines
Picture 4
Underside with flowlines
Picture 5
section with flowlines
im off to make my tea but will be back later with some more on what im looking into