Analyzing the aerodynamic and thermal qualities of a product using experimentation is a well established approach however experimentation can be costly, limiting, time consuming, and difficult to execute especially on a large scale. Fluid mechanics plays a significant role in the engineering process when developing new designs. What is CFD?Ĭomputational fluid dynamics ( CFD) is a branch of fluid mechanics that uses computer numerical analysis and data structures to analyze and solve problems that involve fluid flows, typically solved on large supercomputers. Without the constraints of the wind tunnel, Computational Fluid Dynamics (CFD) methods are ideal for testing and understanding the aerodynamics of these dirt racing cars. Wind tunnel testing for this type of vehicle is difficult due to the extreme yaw (side slip angle) the cars experience while cornering. 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. With a minimum weight of a Dirt Late Model at around 2,300 lbs, these vehicles require a powerful engine producing over 800 horsepower to allow the vehicle to achieve high acceleration and speeds. Dirt Late Model is a unique vehicle, with its inclined nose, flat doors, large spoiler, and open backs. Dirt track racing is a popular form of automotive racing in the United States.
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