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Army Computer Models Unveil Secret to Quieter Small Drones

By U.S. Army Research Laboratory

December 4, 2020

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Researchers with the U.S. Army Combat Capabilities Development Command's Army Research Laboratory (ARL) demonstrated how aviation specialists can acquire information about airfoil boundary layers, using computational fluid dynamics to facilitate development of quieter unmanned aerial drones.

The University of Maryland College Park's Miranda Costenoble said the researchers are using semi-empirical computer models developed more than three decades ago for a specific airfoil to account for broadband noise generated by the drone's rotor blades passing through air; she acknowledged those models “may need to be updated to account for the physics of different airfoil shapes.”

The project is part of a research program at ARL to address unmanned aerial system platform design and control challenges.

From U.S. Army Research Laboratory
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