What is it about?
The motivation of this paper is to use sound waves to reduce flow separation and hence improve the aerodynamic efficiency. Sound waves with certain frequencies and amplitudes can affect the laminar-turbulent transition characteristics of a separated shear layer by amplifying the instabilities within the separated flow. We identified the effective excitation frequency and amplitude ranges for sound waves to suppress flow separation.
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Why is it important?
This work provides a computational approach to an alternative mean of flow control, acoustic excitation, for low speed applications such as unmanned air vehicles or low pressure turbines.
Perspectives
In this fundamental research at Cranfield University, we managed to show that excitation of flow separation over an isolated aerofoil by sound waves can be modelled numerically. And this opens our research a new window. The focus of our work will now shift to other geometries and operating conditions.
Seyfettin Coskun
Cranfield University
Read the Original
This page is a summary of: Improved Delayed Detached Eddy Simulations Applied to a NACA0015 Aerofoil Subject to Acoustic Excitation, June 2022, American Institute of Aeronautics and Astronautics (AIAA),
DOI: 10.2514/6.2022-3237.
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