Affordable Flow Visualization: A 3D-Printed Helium-Filled Soap Bubble (HFSB) Generator for Aerodynamic Testing

Researcher(s)

  • Cameron Hoober, , Illinois Institute of Technology

Faculty Mentor(s)

  • Tyler Van Buren, Mechanical Engineering, University of Delaware

Abstract

In application, HFSB generators are an advanced flow-seeding system for Particle Image Velocimetry (PIV), offering near-neutrally buoyant, micro-sized tracer particles capable of being accurately followed in complex flow structures. However, commercially available options can be costly, potentially limiting access. This project looks to design and fabricate a cost-effective HFSB generator using additive manufacturing and other easily accessible off-the-shelf components. The design leverages consumer-grade 3D printers and inexpensive medical needles to make a nozzle that accurately seeds monodispersed bubbles into the flow field. The design prioritizes affordability, ease of assembly, and modularity for adaptability in various experimental setups. Initial fabrication saw unforeseen setbacks; however, after overcoming these issues, final testing showed promising results for the validity of the project.