Objective: The primary goal of this project was to evaluate and compare the aerodynamic efficiency of four different 1976 Toyota Hilux truck models using CFD simulations. The models included variations with the tailgate up (standard driving configuration), tailgate down, a tonneau cover, and air ducts channeling air into the truck bed.

Methodology: SolidWorks Flow Simulation software was utilized for the CFD analysis. A computational domain was defined based on guidance from a knowledgeable professor, and simulations were set up using the software's wizard. Speed was varied from 40 to 70 mph in 10 mph intervals, while other conditions and specifications were kept constant across simulations.

Key Findings:

1. The truck model with the tonneau cover exhibited the highest aerodynamic efficiency, indicated by a lower drag coefficient compared to other models.

2. Surprisingly, the model with the tailgate down showed poorer aerodynamic performance than the standard configuration with the tailgate up.

3. Multiple iterations of simulations were needed to ensure result consistency and accuracy.

Jake:

Before this project I had never used CFD. It is one thing to see streamlines in a textbook or in example problems, but being able to have animated streamlines over the whole truck helps to bring into perspective how the fundamental concepts we learned during class can be applied in the real world. With trucks being incredibly popular, it was an interest of mine to see how seemingly minor design changes can impact the drag force acting on the vehicle.

Inti:

I had minimal knowledge and experience using CFD or any sort of simulation software and I strongly believe that it is one of the most important skills to have in today’s world for an engineer, the vast majority of problems or scenarios cannot be solved using hand calculations or software we are taught in school, so studying SolidWorks Flow Simulation was a very useful and fun experience.

Click here to read the Report.

Click here to view the Presentation.

Click here to view Jake's personal essay.

Click here to view Inti's personal essay.