Development of a didactic demonstrator for flow-induced noise mechanisms and mitigation technologies

Area of Science:

• Fluid Dynamics
• Aeroacoustics
• Acoustics Engineering

Background:

• Flow-induced noise is a significant challenge in various engineering applications.
• Understanding and mitigating aeroacoustic noise requires effective experimental and educational tools.

Purpose of the Study:

• To design and manufacture a didactic wind tunnel demonstrator for flow-induced noise research.
• To provide an audible and practical platform for assessing noise mitigation strategies.
• To serve as a test bench for aeroacoustic education and preliminary investigations.

Main Methods:

• Development of a multi-functional wind tunnel facility incorporating seven noise mitigation technologies.
• Integration of multiple microphones, advanced signal processing, and real-time audio feedback.
• Creation of a digital twin for design assistance and concept validation.

Main Results:

• The demonstrator effectively illustrates aeroacoustic noise mechanisms at low flow speeds.
• Audible perception of noise generation and reduction by mitigation technologies is achieved.
• The facility proves suitable for rapid, cost-effective preliminary investigations of new noise-reduction concepts.

Conclusions:

• The didactic wind tunnel demonstrator successfully meets its objectives for education and research.
• The facility enables clear perception and assessment of noise mitigation effectiveness.
• Rapid prototyping capabilities enhance its utility for future aeroacoustic concept development.