How fast can a Lamborghini go?
Zyrus Engineering makes performance cars perform even better. Lead by the passionate Radni Molhampour, they are currently rebuilding a Lamborghini Huracan. The new car, named Zyrus LP1200, will be optimised for racing.
What about aerodynamics?
The roles of aerodynamics on car performance increase with speed, so above 150 km/h it becomes critical to both aerodynamic drag, traction, and cooling. On the one hand, an “aerodynamic” design usually means having low drag, which will contribute to high top speed and acceleration. On the other hand, for a racing car it is equally important that the aerodynamic design produces a high “down force”. High down force means that the cars outer geometry leads the airflow in such a way that the car acts like a upside-down airfoil wing, and therefore pushes the car down onto the road. The higher the down force, the higher the traction. Balancing good aesthetics, low drag, and high down force is a complex task that all sports car designers are facing.
cDynamics was approached by Zyrus to aid in the aerodynamic considerations of their design. Using computational fluid dynamics (CFD) simulations, we can accurately analyse how the airflow behaves around the car at any given speed. Furthermore, by integrating the pressure fields we can compute the forces acting on the car. By iterating on the design we gain insights into how the design influences the aerodynamic performance. Zyrus Engineering saw the value of these insights, and gave cDynamics the tasks of designing several key components. We have given input on the overall design, and been responsible for both front and rear diffuser, as well as the rear wing. The custom rear wing designed by cDynamics produced a higher ratio of down force to drag force than any commercially available wing we have found.
Too much turbulent flow equals bad news
Below is a short video showing the transient airflow from a CFD simulation. At the front of the car the pressure (indicated by the colour scale) is high and almost constant. At the wheels, and behind geometric edges, the flow becomes turbulent. The turbulence makes the aerodynamic forces difficult to control, and is ideally avoided by creating very smooth designs.
We look forward to see the finished car, and wish Zyrus Engineering the best of luck with their new projects.
Below are some more photos from this project: