Re: UNH Wildcats: 2010-2011 Season Thread
Winds of opportunity: UNH provides first look at huge wind tunnel
By Aaron Sanborn
asanborn@fosters.com
Saturday, November 20, 2010
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EJ Hersom/Staff photographer Joe Klewicki, professor of mechanical engineering, speaks about the University of New Hampshire's new wind tunnel Thursday in Durham. The wind tunnel designed to study turbulence flow is the largest of its kind in the world.
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DURHAM — The University of New Hampshire's newest addition will literally blow you away.
Tucked away on the outskirts of campus is a massive wind tunnel that has no equal.
At 300 feet long, the new Flow Physics Facility is the world's largest scientific quality boundary-layer wind tunnel facility.
"It's three times the length of its next closet competitor," said Joe Klewicki, professor of mechanical engineering and director of the Center for Fluid Physics "It's truly unique. There's no college or university that has a facility this big."
Klewicki said the facility 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 mph 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, according to Klewicki.
The wind tunnel also includes a turntable, where researchers can place a cityscape and study how the release of a chemical into the atmosphere would flow around buildings, along with how certain structures and materials hold up in the wind.
For Klewicki, the construction of a wind tunnel is something he has longed dreamed of.
"It's something that has been on my mind forever," he said.
He felt that UNH would be the perfect location for one because of its strong areas of focus in physics, engineering and ocean and atmospheric studies. Klewicki sees all these areas of study potentially benefiting from the tunnel.
"There's probably a lot of other potential uses that we haven't even imagined yet," he said.
The tunnel is also ideally suited for human-scale aerodynamic studies, according to Klewicki.
For example, athletes like skiers or bicyclists could be positioned in the tunnel, while scientists and coaches conduct research on how to improve helmet design, posture, or pedaling position for maximum efficiency.
Klewicki said it would likely be another six months before the tunnel is fully operational. From the early feedback he has received, Klewicki said both the students and the university community are really excited about the new addition.
"We really hope to make the facility available for student projects," he said.
He would also be open to businesses and other commercial entities using the tunnel at some point in the future.
The $3 million facility was funded by a grant from the National Science Foundation, along with funding from the university and the Office of Naval Research.
The facility is shaped like a rectangular box, 300-feet long by 20-feet wide.
Klewicki said the fans create suction that pulls air through open garage-style doors on the opposite end of the facility. He said unless both garage doors are open, the fans won't run. This precaution prevents structure damage.
Other features of the building include a 10-inch-thick poured concrete floor, moisture-proof walls, windows designed to accommodate laser measurement from the outside, and drag plates on the floor for measuring aerodynamic force, as on an airplane.
The new facility will be formally dedicated on Tuesday, Dec. 7.