The University of New Hampshire is now home to a wind tunnel that is the largest of its type in the world.
At 300 feet long, the new Flow Physics Facility (FPF) is the world’s largest scientific quality boundary-layer wind tunnel facility. It will help engineers and scientists better understand the dynamics of turbulent boundary layers, informing the aerodynamics of situations such as atmospheric wind over the ocean, the flow of air over a commercial airplane or of sea water over a submarine.
Two 400-horsepower fans, each moving 250,000 cubic feet of air per minute, can generate a wind of approximately 28 miles per hour in the facility. The relatively low velocity of wind generated over a great distance makes for greater accuracy in measuring the turbulence that develops in a specific class of flows known as high Reynolds number flows.
“The philosophy behind this facility is the big and slow approach,” says Joe Klewicki, professor of mechanical engineering and director of the Center for Fluid Physics, as well as outgoing dean of the College of Engineering and Physical Sciences.
“Turbulence is often called the last unsolved problem in classical physics, and our lack of understanding has many adverse effects, from weather prediction to engineering design and practice,” says assistant professor of mechanical engineering Martin Wosnik, who helped design the facility with Klewicki and assistant professor of mechanical engineering Chris White. “This new facility will help us test, for the first time, new theories that are emerging to update the classical views of turbulence, which date from the 1930s and ‘40s.”
Researchers from UNH and beyond will use the facility to explore the aerodynamics of, for instance, the junction of the wing and fuselage on an airplane. “This is a huge issue for aircraft companies, because it enables them to better predict or even manipulate fuel economy,” says Klewicki. Or by placing a model cityscape on a turntable in the wind tunnel, engineers could model how the release of a chemical into the atmosphere would flow around buildings.
The wind tunnel is also ideally suited for human-scale aerodynamic studies, says Klewicki. By positioning athletes like skiers or bicyclists in the tunnel, scientists and coaches could improve helmet design, posture, or pedaling position for maximum efficiency. For elite competitors, “the smallest change in where your knee is when you pedal, for instance, can mean the difference between finishing first or fifth,” says Klewicki.
The FPF, which is on Waterworks Road on the eastern edge of campus, is essentially a rectangular box, 300 feet long by 20 feet wide. The fans create suction that pulls air through open garage-style doors on the opposite end of the facility: “Unless both garage doors are open, the fans won’t run. Without such precautions one could cause damage to the structure,” says Klewicki.
Other features of the facility, which cost $3 million, are a 10-inch-thick poured concrete floor; moisture-proof walls; windows designed to accommodate laser measurement from the outside; a turntable; and drag plates on the floor for measuring aerodynamic force, as on an airplane.
Funding for the FPF was provided by the National Science Foundation through EPSCoR (Experimental Program to Stimulate Competitive Research), the Office of Naval Research, and UNH.
The University of New Hampshire, founded in 1866, is a world-class public research university with the feel of a New England liberal arts college. A land, sea, and space-grant university, UNH is the state's flagship public institution, enrolling 12,200 undergraduate and 2,300 graduate students.Photographs available to download:
Beth Potier | Newswise Science News
When fluid flows almost as fast as light -- with quantum rotation
22.06.2018 | The Henryk Niewodniczanski Institute of Nuclear Physics Polish Academy of Sciences
Thermal Radiation from Tiny Particles
22.06.2018 | Universität Greifswald
In a recent publication in the renowned journal Optica, scientists of Leibniz-Institute of Photonic Technology (Leibniz IPHT) in Jena showed that they can accurately control the optical properties of liquid-core fiber lasers and therefore their spectral band width by temperature and pressure tuning.
Already last year, the researchers provided experimental proof of a new dynamic of hybrid solitons– temporally and spectrally stationary light waves resulting...
Scientists from the University of Freiburg and the University of Basel identified a master regulator for bone regeneration. Prasad Shastri, Professor of...
Moving into its fourth decade, AchemAsia is setting out for new horizons: The International Expo and Innovation Forum for Sustainable Chemical Production will take place from 21-23 May 2019 in Shanghai, China. With an updated event profile, the eleventh edition focusses on topics that are especially relevant for the Chinese process industry, putting a strong emphasis on sustainability and innovation.
Founded in 1989 as a spin-off of ACHEMA to cater to the needs of China’s then developing industry, AchemAsia has since grown into a platform where the latest...
The BMBF-funded OWICELLS project was successfully completed with a final presentation at the BMW plant in Munich. The presentation demonstrated a Li-Fi communication with a mobile robot, while the robot carried out usual production processes (welding, moving and testing parts) in a 5x5m² production cell. The robust, optical wireless transmission is based on spatial diversity; in other words, data is sent and received simultaneously by several LEDs and several photodiodes. The system can transmit data at more than 100 Mbit/s and five milliseconds latency.
Modern production technologies in the automobile industry must become more flexible in order to fulfil individual customer requirements.
An international team of scientists has discovered a new way to transfer image information through multimodal fibers with almost no distortion - even if the fiber is bent. The results of the study, to which scientist from the Leibniz-Institute of Photonic Technology Jena (Leibniz IPHT) contributed, were published on 6thJune in the highly-cited journal Physical Review Letters.
Endoscopes allow doctors to see into a patient’s body like through a keyhole. Typically, the images are transmitted via a bundle of several hundreds of optical...
13.06.2018 | Event News
08.06.2018 | Event News
05.06.2018 | Event News
22.06.2018 | Life Sciences
22.06.2018 | Physics and Astronomy
22.06.2018 | Life Sciences