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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

Farewell, FLIP! Renowned Navy-Owned Research Platform Retired after 60 Years of Service

A dynamic era in naval oceanography recently ended as the iconic Floating Instrument Platform — popularly known as FLIP — was officially retired from service. Built in 1962 with funding from the Office of Naval Research (ONR), FLIP helped generations of scientists and oceanographers better understand the mysteries of the sea, including internal waves, air-sea interaction and long-range sound propagation. Sadly, age and exorbitant life-extension costs resulted in the platform being disestablished. On Aug. 3, a solemn gathering of well-wishers watched as FLIP was towed, at sunset, to a dismantling and recycling facility. Last month, a formal good-bye ceremony was hosted by the Marine Physical Laboratory at the University of California, San Diego (UCSD). Though retired, FLIP will live on at Scripps. One of its booms (crane-like arms for suspending instruments) will be installed on the Scripps research pier in La Jolla and used to deploy instruments. Also, artifacts from the platform will be displayed in a permanent exhibit at Scripps’ Birch Aquarium.
August 16, 2023

History-Making Oceanographer and Ret. Navy Captain Dies at 92

Retired U.S. Navy Capt. Don Walsh, best known for his daring dive to the deepest spot on Earth, nearly 36,000 feet below the ocean’s surface, has died at age 92. Walsh was a co-pilot of the Trieste bathyscaphe, a deep submergence vehicle acquired by the Office of Naval Research (ONR) in 1958. Two years later, on January 23, 1960, Walsh and Swiss engineer Jacques Piccard, son of the inventor of the bathyscaphe, became the first humans to descend into the Challenger Deep, located in the Pacific Ocean’s Mariana Trench. “ONR sponsored the Trieste, but it was then-Lt. Don Walsh who made the very daring decision to make the first descent into the deepest spot of the earth’s ocean. Walsh was a Navy officer, a submariner, an adventurer, and an oceanographer. To his family, we extend our deepest condolences and gratitude for allowing him to explore, and share his extraordinary experiences and knowledge with us,” said Chief of Naval Research Rear Adm. Kurt Rothenhaus.
November 16, 2023

Chemical Physics

The Office of Naval Research's Chemical Physics program seeks to deepen the understanding of the interactions between Naval systems and the chemicals that surround them.
March 18, 2022

ONR Global Gaining Insight into the Effects of Glacial Melting in Coastal Regions

A research project from the Office of Naval Research (ONR) Global is providing valuable information about the effects of melting glaciers in Patagonia that feed into coastal fjords, transporting sediments, freshwater and nutrients. Dr. Chris Konek, science director at ONR Global in Chile, said the research will help the Department of the Navy (DoN) understand the effects of a changing climate on the coastal environment. “That’s the kind of the thing the Marines need to be able to handle,” he said. “It’s basic research and so it will help provide a fundamental understanding of this aspect of coastal systems where you can expect more things like this to happen in the future – more glacial melting as opposed to less.” Cristian Escauriaza, professor, Pontificia Universidad Católica de Chile, is the principal investigator along with his university colleague, Megan Williams. They are working with the Filantropía Cortés-Solari, a conservation organization that owns and manages the Melimoyu Elemental Reserve in northern Patagonia. Patagonia is largely remote with a diverse ecosystem and a rich array of wildlife, including penguins and blue whales. Konek said ONR Global is interested in Escauriaza’s project for its potential to inform what’s happening to that ecosystem, which can also help inform what’s happening to other coastal regions experiencing the same challenges.
February 14, 2024

TechSolutions and Marines Bring a Decades-Old Process into the 21st Century

Assessing surf zone conditions has never been an exact science for the Department of the Navy. That’s about to change thanks to a recent request to TechSolutions, which has resulted in new surf observation (SUROB) technology to make operational forecasts more precise. For the past six months, a team of scientists and engineers from the Naval Research Lab (NRL) and the U.S. Army’s Engineering Research and Development Center (ERDC) have been developing the technological tools needed to create a more precise surf observation report. In order to gain greater insight into how the surf observation tool may improve warfighter operations, NavalX recently organized a workshop that brought together the science and engineering developers with the Sailors and Marines who would use it. TechSolutions received the request less than a year ago for a technology-driven solution for surf observation from Maj. Zachary Taylor, a technology officer with the Marines’ Warfighting Lab. Within weeks, TechSolutions began working with the development team at NRL and ERDC to come up with a prototype.
April 04, 2024

Electric Boat Competition Sparks Interest in Naval Science Careers

Student engineering teams from Princeton, Washington College and the University of Alabama have won first place in their respective events at the “Promoting Electric Propulsion” (PEP) boat races, sponsored by the Office of Naval Research (ONR) and the American Society of Naval Engineers (ASNE). In just six years, this electric boat-building competition has grown from a single university to 34, with more than 200 students who took part in the five-mile races on Broad Bay in Virginia Beach. Dr. Steve Russell, program officer, Sea Warfare and Weapons department, said he launched the PEP competition with a colleague from ASNE, Dr. Leigh McCue, and Tim Cullis, Naval Sea Warfare Center Carderock, after seeing a public race by local hobbyists in the Chesapeake Bay.
April 22, 2024

National Strategy on Aquatic Environmental DNA

Today, the White House Office of Science, Technology, and Policy (OSTP) released the “National Strategy for Aquatic Environmental DNA.” The Environmental DNA (eDNA) Task Team had 10 federal agencies participating in drafting the strategy and included significant scoping and engagement of the private sector, academia and non-profit organizations.
June 03, 2024

Multi-scale Mechanics

The Office of Naval Research's multi-scale mechanics research area endeavors to develop multiscale and multiphysics mechanics theories that bridge the nano scale to the continuum scale to predict material and structural strength.
March 18, 2022

Resilient Structures

The Office of Naval Research's resilient structures research area endeavors to develop structural configurations, materials and technologies to enable self-sustainable, self-repairable and highly damage resistant structures.
March 18, 2022