An EPFL Ph.D. student specializing in mechanical engineering has developed a device that significantly dampens the flow-induced vibration caused by rotating parts like boat propellers, turbines, and hydraulic pumps. This groundbreaking device, which can be manufactured using a 3D printer, has recently received a patent.
Thomas Berger, a Ph.D. student at EPFL’s School of Engineering, stumbled upon this revolutionary discovery early in his academic career. His research, now published in Scientific Reports, evolved from his master’s studies, with the incorporation of 3D printing technology leading to the creation of a promising solution that has attracted investor interest.
Berger conducted his research under the guidance of Mohamed Farhat at a laboratory focused on complex fluid dynamics for applications in sailboats and hydropower turbines. The primary focus of their work is to address challenges related to flow-induced vibration, a significant concern for turbine designers and operators.
The core of Berger’s innovation lies in eliminating the vortices responsible for much of the vibration. Vortices are formed when a fluid flows over an obstacle, generating oscillating pressure on the surface and causing vibration. Strong vortices can pose a threat to turbines and structures, as evidenced by historical events like the Tacoma Narrows Bridge collapse in 1940.
Berger’s device incorporates a unique gyroid shape derived from mathematics, known for its porous, tortuous, lightweight, and sturdy properties. By attaching the 3D-printed gyroid to a steel blade and running experiments in a tunnel, Berger successfully prevented vortex formation and subsequent vibration.
Investors are now showing interest in Berger’s technology, prompting further testing of the gyroid under more challenging conditions within turbine systems. The future holds exciting possibilities for this innovative solution aimed at mitigating flow-induced vibration in rotating parts.
