This project is the continuation of a previous project, where I made a very rudimentary wind tunnel with a hairdryer and some wood panels. In that project, I barely covered how the wind tunnel was constructed, and the end result gave less than satisfactory results, so I am revisiting that project here, instead making the tunnel out of primarily 3d printed parts.
This shape was the backbone of the whole assembly. It converged down to a smaller area from right to left to accelerate the airflow without needing a faster fan. Designing the tunnel in this way meant I could use a larger fan that span slower to make the tunnel much quieter and more efficient, while having the same airspeed capabilities of a higher speed fan. The slower spinning blades also reduce vortices dramatically.The base was then printed with supporting mounts, where toothpicks were used to hold the walls in place while they were being glued to align them. The toothpicks could then be removed, leaving perfectly straight, aligned walls. The bump on the base was to accomodate the fan's size, with a fillet to ensure a tight fit to hold the fan in place with friction, so that it can be replaced at a later date if needed.
