What is it about?
Wind tunnels with Kevlar walls provide an excellent test environment for combined aerodynamic and acoustic testing of subcomponents of aircrafts or wind turbines. The Kevlar walls of the wind tunnel and the velocity discontinuity on the wall are an alteration of the flow and sound field compared to the one that is present in operating conditions of the machine. This paper proposes a set of analytical corrections that allow to compensate for the change of the path and amplitude of the sound wave when it propages through the Kevlar membrane and restore the values that would be obtained under operational conditions.
Featured Image
Photo by Waldemar Brandt on Unsplash
Why is it important?
The results of the wind tunnel test can be used to predict the performance of the components under operating conditions more accurately if the analytical corrects are applied. A better understanding of wind tunnel test results can lead to improved designs and faster development of wind turbines or aircrafts.
Perspectives
I hope that our research helps to development low noise wind turbine designs so that ultimatively the public acceptance of on-shore wind farms will increase and the full potential of this technology can be exploited to solve the energy problem by reducing the global CO2 emissions and decrease the dependence on fossil fuels.
Andreas Fischer
Danmarks Tekniske Universitet
Read the Original
This page is a summary of: Analytical shear layer corrections for acoustic transmission in Kevlar walled wind tunnels and their experimental validation, June 2022, American Institute of Aeronautics and Astronautics (AIAA),
DOI: 10.2514/6.2022-2979.
You can read the full text:
Resources
Contributors
The following have contributed to this page
