Dirt track racing is a popular form of automotive racing in the United States. Dirt Late Model is a unique vehicle, with its inclined nose, flat doors, large spoiler, and open backs. Typical weight of a Dirt Late Model is a minimum of 2,300 lbs. These vehicles require a powerful engine that can produce over 800 horsepower that allows the vehicle to achieve high speeds. From the tight wheel arches to the angle and location of the rear spoiler to the different fender heights, every design component of this vehicle influences aerodynamics. Wind tunnel testing for this type of vehicle is difficult due to the extreme yaw (side slip angle) the cars experience while cornering. Without the constraints of the wind tunnel, Computational Fluid Dynamics (CFD) methods are ideal for testing and understanding the aerodynamics of dirt racing cars.
This is the first installment of Is it fast or just cool. In this series, we will release computational fluid dynamics (CFD) analysis of popular fiction or everyday vehicles. TotalSim US has completed an aerodynamic analysis using computational fluid dynamics (CFD) of the Batmobile to see how cool it really is…
Simulation is transitioning from a highly specialized operation performed by experts at the end of the design process to a more ubiquitous activity that can help optimize products throughout the design cycle. That means companies are doing more simulation and asking for results much faster.
CFD Engineer, Andy Luo, presented at the 3rd AIAA CFD High Lift Prediction Workshop hosted by the AIAA Aviation and and Aeronautics Forum and Exposition on June 3, 2017 in Denver, CO. The Workshop was well attended with 36 participants from 14 countries ranging from academia to CFD vendors to research labs.
Thanks to the meticulous work of the simulation industry’s leading artists and vehicle dynamicists, the 50+ digital race cars available on iRacing.com look, drive and race like their real world counterparts. The key word there is “digital.” For, when all is said and done, iRacing’s stock, sports and open wheel cars are constructed of advanced mathematics and physics calculations rather than physical parts. There isn’t a real bolt, A-arm or wing to be found.