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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

Directed Energy Weapons: Counter Directed Energy Weapons and High Energy Lasers

The Directed Energy Weapons (DEW) Program is part of the Office of Naval Research's Naval Air Warfare and Weapons Department.

March 18, 2022

Directed Energy Weapons: High Power Microwaves

The Directed Energy Weapons (DEW) Program is part of the Office of Naval Research's Naval Air Warcraft and Weapons Department.

March 18, 2022

Making Hydrogen Fuel Anywhere: ONR Tests Prototype to Power Marines in Expeditionary Environments

ONR Global TechSolutions program is sponsoring efforts to convert aluminum into hydrogen fuel, which could potentially serve as a portable, readily available power source.

February 15, 2022

Fundamental Research Towards Expeditionary Air Warfare & Weapons

BAA Call N0001424SBC02 Special Program Announcement for Office of Naval Research (ONR) Research Opportunity: Fundamental Research Towards Expeditionary Air Warfare & Weapons

October 23, 2023

Power and Propulsion Systems for Unmanned Undersea Vehicles

The proposed topic will explore and exploit the lack of underwater propulsion systems that can efficiently work across a wide variety of speeds over long distances. In particular, this effort is interested in a propulsion system able to transition between low and high speeds, to include the ability to stop and re-start at any time. Other desired characteristics will be briefed at the event. The program will pursue technologies and systems that support development and demonstration of a system that can propel an underwater vehicle in the ways listed. Further mission profile details will be provided at the Industry Day.

January 23, 2024