F1 in Schools World Finals CFD Analysis
Brett Sizeland and his Basilisk Performance team won the Australian F1 in Schools title in March 2010, helped by Computational Fluid Dynamics (CFD) simulations performed in Caedium Professional. However, it doesn't end there, by winning the Australian title the team qualified for the F1 in Schools World Finals to be held September 20-22, 2010 in Singapore. Without pausing for breath, Brett set about designing a new car, with help again provided by Caedium CFD simulations.
Due to rule changes brought in for the World Finals the the car that won the Australian title required a radical redesign. The new rules required a wire guide to run the length of the car, which then prevented the split chassis design that worked so well in the Australian title car.
Brett designed 2 alternate cars in CATIA for CFD analysis in Caedium. You'll be able to see from the results below that the main difference between the 2 designs was the placement of the front wing - high-mounted in Design 1 and low-mounted in Design 2. Also Design 1 used blended end plates on the wings, whereas Design 2 did not have any end plates.
The flow conditions and turbulence model were identical to those in the CFD simulations performed for the Australian title car:
- Free-stream air speed and moving-ground speed = 22 m/s
- Wheel rotation speed = 16,307 rpm = 97,804 deg/s
- CO2 jet speed (assuming nozzle diameter = 4 mm) = 154 m/s
- k-omega SST
At the time of this study a pre-release of Caedium with new parallel and 64-bit capabilities was used to perform the CFD simulations - this allowed much faster turnaround time of the simulations compared to those performed for the Australian title car.
|Quantity||Title Car||Design 1||Design 2|
The first thing to note is that both of the new designs both have more drag than the Australian title design - most likely due to the increase in surface area and cross-sectional area with the new full chassis. The drag difference between the two new designs is essential zero. Given that the drag is directly proportional to the cross-sectional area of the car, which in turn is dominated by the CO2 canister housing and the wheels, then the placement of the front wing seems to have little effect on the overall drag of the car. However, this is not the case for lift. It appears that locating the front wing close to the ground has caused some mild ground effects, resulting in downforce that reduced the lift for Design 2 compared to Design 1. This is potentially a desirable feature to ensure that the nose of the car pitches downwards so that the car doesn't have a tendency to get airborne.
At the time of writing, the new Basilisk Performance car is still under wraps, but in a few days all will be revealed as teams from around the world compete for the F1 in Schools World Finals. Hopefully Basilisk Performance will be in the mix when awards are presented.
Good luck Brett, Ben, Keira, and Aidan.