Experiential learning with a 3D printed wind tunnel

Experiential learning opportunities in aerodynamics instruction often relies on large, expensive, and sometimes impersonal demonstrations, frequently relying on research-focused wind tunnels. For larger class sizes, such facilities may have several downsides, such as safety considerations, ambient noise levels, and access. A small, inexpensive wind tunnel enabled by 3D printing can allow for more personal, more tactile learning experiences, where students can safely operate the device themselves, at acceptable noise levels for ordinary classrooms. In this way, students can use the device as a problem-solving tool that supplements theory – mirroring the way such tools are used in research – in addition to a demonstration. This manuscript describes the design of a 3D printed wind tunnel, including our decision-making process for the design compromises between pedagogical goals and aerodynamic quality, and our experiences introducing this tool into a mixed undergraduate/graduate class. The wind tunnel was integrated into assignments as a date source, and a voluntary survey was performed to gauge the perceived value of the activity. The student feedback was very positive, with many commenting that the wind tunnel activities improved their understanding of the theory that was taught simultaneously and assisted in their assignment work. We are including full 3D models for printed components are included in supplementary materials, along with assembly instructions, and anticipate that this wind tunnel can be reproduced for under 50CAD in filament if basic components like fasteners are available, provided access to an appropriate 3D printer.