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A Mighty Wind: Using Wind Tunnels to Measure Sound by Deadening the Noise

The Office of Naval Research (ONR) sponsored a project at Virginia Tech University nearly 20 years ago that is now growing in influence across the world for measuring aerospace and aeronautical acoustics. Since noise reverberates against solid surfaces, such as the walls of a wind tunnel where acoustical testing takes place, collecting accurate sound data had been nearly impossible at the time. Researchers were also struggling to discern the sound of the wind tunnel’s air flow from the noise of the object traveling through it. After learning about some experiments on Kevlar as a wind screen, William Devenport, an engineering professor and director of Virginia Tech’s Stability Wind Tunnel, said he and a colleague wrote a proposal to then-ONR program officer Ron Joslin to try adding Kevlar to their wind tunnel walls. Devenport submitted the original grant proposal (N00014–04–1–04933) through the FY 2004 Defense University Research Instrumentation Program (DURIP) for alterations to Virginia Tech’s existing Stability Wind Tunnel that would allow it to measure flow-induced noise of relevance to Navy applications.

August 14, 2023

Business of Innovation: CNR to Talk Transformative Tech at Sea-Air-Space

Chief of Naval Research Rear Adm. Kurt Rothenhaus will moderate a panel of industry leaders at the Navy League’s Sea-Air-Space Exposition, April 8-10, at the Gaylord National Resort and Convention Center in National Harbor, Maryland.
April 02, 2024

Down Under Demo: ONR Touts Additive Manufacturing Tech at Australian Event

The Office of Naval Research (ONR) — and its international arm, ONR Global — participated in the recent Autonomous Warrior 2023 (AW23) exercise, located at HMAS Creswell in Jervis Bay, Australia.
February 23, 2024