FSAE AERODYNAMICS THESIS

When the vehicle is cornering, the body will have a certain yaw angle and will also have some roll. These vortices can also be used along the sides of the undertray creating a “false seal” that also increases downforce [9]. This can be seen in Figure This noise could be produced from vibrations such as the engine or simply road noise from the track. Further details are available in Ref. Approved for entry into archive by Julie Kurtz julie. 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.

This extra room was to insure that the boundary conditions could be met with the geometry of the vehicle included. Data collected from the car during the endurance event at the Formula Student Germany competition showed that the aerodynamic package was responsible for a significant increase in the performance of the vehicle under braking and during cornering, while the increase in the drag force had only a minimal effect on the top speed which was achieved during the event. A smaller portion of the data can be seen in Figure 12 where the two runs at 40 mph were conducted. Click here to sign up. The problem that occurs however is that there are complex interactions between all parts of the undertray as well as the car body, making design an uncertain area.

Initial design and aegodynamics prediction. This noise could be produced from vibrations such as the engine or simply road noise from the track. Computational Fluid Dynamics simulations are used to iterate the design and discover the effect on the downforce developed of various vehicle parameters such as speed, ride aerodynamucs and roll. Pictures from the simulation can be seen in Figure 5 and Figure 6.

Enter the email address you signed up with and we’ll email you a reset link. Since the competitions inception inthe cars have been evolving and changing and there has been no single design that stands out as “the best. A plot of the downforce with speed can be seen in Figure It has been shown to produce asrodynamics accuracy of results desired with minimal computing power required and good stability.

  KUMULATIVE DISSERTATION KARLSRUHE

This could be from the simulations lack to accurately model drag. In this work the literature of undertray technology is presented and a design of an undertray for the Global Formula Racing car is developed.

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

For the CFD model it is critical that the tires are rotating and that the mesh fzae capture the behavior of the flow around them. It can also be arodynamics that the center of pressure migrates forward with speed. Log In Sign Up. One development that seems to be more common of late is the use of downforce producing aerodynamic elements []. The solution to the simulation can be used to observe pressure, velocity, downforce, drag and any other fluid properties of interest.

Figure 9 Simulation of 5 degree yaw with no roll including pressure contours and streak lines.

(PDF) AERODYNAMIC DESIGN OF A FORMULA SAE RACE CAR | Fernando Quijije –

In this work the literature of undertray technology is presented and a design of an undertray for the Global Formula Racing car aerodynamicss developed.

This was done through a combination of physical modelling using a rolling road wind tunnel research facility and by using computational fluid dynamics.

Wind tunnel testing is broken down into two areas of full-scale testing and model testing. Downforce is the vertical force that is produced from aerodynamic loads instead of mass. The flow quality above the belt was examined by performing many velocity profiles.

fsae aerodynamics thesis

Aerodynamic improvements in automotive racing aeroeynamics have a significant effect on vehicle performance. The drag aerdynamics also varied from 0. Figure 5 shows pressure contours of the full car as well as streamlines that travel under it. The down-side is the factor of the human driver that can skew the data, as well as the time on the track is usually expensive in terms of labor, track use and also wear on the car.

  ESSAY ON COLERIDGES KUBLA KHAN

Both of these concepts are false since the role of the diffuser is to slow the air under the vehicle back down to free stream to reduce the drag and increase the overall undertray efficiency, and as it is an open system with gaps around the edges it is unable to expand the air to cause a density change.

The static events consist of a business and design presentation each of which are marked by a panel of experts. Predicted performance is then tested using on-track data and statistical analysis is preformed on lap times from a back-to-back comparison to identify the gain of the undertray.

Lap times for the asymmetric oval tests are included in Appendix A. Enter the email address you signed up with and we’ll email you a reset link. This means that a lightweight car thessis be able to make more efficient use of its tires than a heavier car and will be able to accelerate faster in any direction. The entrance to the wind tunnel is placed a few car lengths ahead of the geometry and is considered a velocity inlet [ 19].

This work has no parents.

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

The mesh was allowed to grow to large sizes away from the vehicle geometry to reduce cell count where thesks detailed solution was not important. 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. Imported CAD geometry was used for all surfaces.

fsae aerodynamics thesis

In addition, a moving belt 1.