Figure 2 Prism layer mesh detail. This could be from the simulations lack to accurately model drag. With these things in mind, it is the diffuser angle and entrance location that drives the undertray performance. This would give the representative gain or loss of the aerodynamic changes to the vehicle. You do not have access to any existing collections. Remember me on this computer. A track map extracted from GPS data can be seen in Figure 3.

Figure 3 Track map of test asymmetric oval test track 5. In combination with a 1. Since the underbody of the car is of most interest, some sort of boundary layer control needs to be used. In this work the literature of undertray technology is presented and a design of an undertray for the Global Formula Racing car is developed. Vortices can also be used on other parts of the undertray. Aerodynamics of High Performance Vehicles. A smaller portion of the data can be seen in Figure 12 where the two runs at 40 mph were conducted.

For this case the downforce increased to 62 pounds and it can also be seen in the figure that it will cause a roll moment on the car that will want to roll the car into the corner. Jensen, Karl Karl Eugene.

fsae aerodynamics thesis

Robert Paasch for his support and advice throughout this work thesiis well as the Global Formula Racing team for their support of the project. The performance benefits which can be gained through the resulting increase in traction has made the search for increased downforce and reduced drag a highly sought after performance edge in motorsport. Jensen, Karl Karl Eugene. This was done through a combination of physical modelling using a rolling road wind tunnel research facility and aerodynamjcs using computational fluid dynamics.


Design and Validation of a Front Wing for a Formula SAE car

Data were collected from the four acceleration runs undertaken at the Formula Student Germany competition. Full traces of the data can be seen in Figure 11 with total spring force shown aefodynamics the red trace in the third graph down and vehicle speed as the fourth graph down.

Data presented in Katz et al. Both wind tunnel methods have the advantage of doing flow visualization such as smoke, oil streaking and yarn tufts [5, ] and also that consecutive runs can be completed quickly. The competition comprises both static and dynamic events. thesie

Design and Validation of a Front Wing for a Formula SAE car

Mechanical, Industrial, and Manufacturing Engineering. Mechanical, Industrial, and Manufacturing Engineering. Figure 11 Full data from straight line test including spring force and speed. Figure 2 Prism layer mesh detail.

The aerodynamic appendages enable the centre of pressure to be moved substantially, and give the designer considerable freedom to optimise the design. With these things in mind, it is the diffuser angle and entrance location that drives the undertray performance.

Submitted by Karl Jensen jensenka onid. This can lead to a stabilizing effect at higher speeds but also means that the car will become less responsive and have a tendency to understeer. For back-to-back comparisons with and without the undertray an asymmetric oval course was set up.

All of these ideas can be used together to create an effective undertray that will produce large amounts of downforce with a relatively small increase to drag. Also included in the figure are the baseline values of the vehicle without any aerodynamic elements.

This work has no parents.

fsae aerodynamics thesis

To reduce the total cell count, and therefore computing time, a symmetry plane was used down the center of the vehicle. Two of the three available axes from the accelerometer were utilised to determine the braking, acceleration and cornering performance of the vehicle. The mesh was allowed to grow to large sizes away from the vehicle geometry to reduce cell count theiss the detailed solution was not important. Further details are available in Ref.


The static faae consist of a business and design presentation each of which are marked by a panel of experts. Like a venturi there is a nozzle that increases the velocity of the air underneath the vehicle, a throat where the maximum velocity is reached and a diffuser where the air is slowed back down to free stream velocity.

Through research a basic shape for an undertray can be constructed that can then be iterated to generate more downforce using CFD simulation as a tool.

This means that a lightweight car will be able to make more efficient use of its tires than a heavier car and will be able to accelerate faster in any direction.

Pictures from the simulation can be seen in Figure 5 and Figure 6.

Figure 3 Track map of test asymmetric oval test track 5. From the literature review it was found that the simulation of the tires was important to the accuracy of the rest of the model [5, ]. For a race car, balance is critical to vehicle performance due to its effects on understeer and oversteer characteristics [].

fsae aerodynamics thesis