Existing Wind Tunnels
Turbulence Research Laboratory
K. George, Rolf Karlsson,
Martin Wosnik, and T. Gunnar Johansson
Department of Thermo and Fluid Dynamics
Chalmers University of Technology, Gothenburg, Sweden
Experimental work in a large research wind tunnel is needed
to solve a number of fundamental questions and enable scientists and
engineers to further improve computations of turbulent flow. Simply
put, the problem is how to achieve a separation of length scales, energetic
to dissipation, of 10^5 or larger and still be able to resolve
the smallest scales occurring in the flow with the smallest technically
feasible probes (approximately 10 x10^(-6)m).
The Nordic Wind Tunnel...
- will be a very large (test section: length 40m, cross-section 3m
x 3m), low-speed wind tunnel with very low background turbulence (u'/U
< 0.02%). It will be the only facility in the world with this combination
of size (length and width) and high flow quality.
- will enable turbulence experiments on a scale that will not be achievable
with computers for many decades. It will be used to address many of
the fundamental questions that have held back turbulence research
for half a century.
- also has tremendous potential for commercialization due to its unique
size and flow quality. This ensures its long-term viability serving
a variety of industries.
- will be operated as a major Nordic and European Facility. Many of
the world's leading scientists have enthusiastically endorsed this
facility (see letters of support) and they expect high quality work
to result from it.