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Fred L. Haan, Jr.,Partha P. Sarkar,Nicholas J. Spencer-Berger 한국풍공학회 2006 Wind and Structures, An International Journal (WAS Vol.9 No.5
A combination Aerodynamic/Atmospheric Boundary Layer (AABL) Wind and Gust Tunnel with a unique active gust generation capability has been developed for wind engineering and industrial aerodynamics applications. This facility is a cornerstone component of the Wind Simulation and Testing (WiST) Laboratory of the Department of Aerospace Engineering at Iowa State University (ISU). The AABL Wind and Gust tunnel is primarily a closed-circuit tunnel that can be also operated in open-return mode. It is designed to accommodate two test sections (2.44 m 1.83 m and 2.44 m 2.21 m) with a maximum wind speed capability of 53 m/s. The gust generator is capable of producing non-stationary gust magnitudes around 27% of the mean flow speed. This paper describes the motivation for developing this gust generator and the work related to its design and testing.
Haan, Fred L. Jr.,Sarkar, Partha P.,Spencer-Berger, Nicholas J. Techno-Press 2006 Wind and Structures, An International Journal (WAS Vol.9 No.5
A combination Aerodynamic/Atmospheric Boundary Layer (AABL) Wind and Gust Tunnel with a unique active gust generation capability has been developed for wind engineering and industrial aerodynamics applications. This facility is a cornerstone component of the Wind Simulation and Testing (WiST) Laboratory of the Department of Aerospace Engineering at Iowa State University (ISU). The AABL Wind and Gust tunnel is primarily a closed-circuit tunnel that can be also operated in open-return mode. It is designed to accommodate two test sections ($2.44m{\times}1.83m$ and $2.44m{\times}2.21m$) with a maximum wind speed capability of 53 m/s. The gust generator is capable of producing non-stationary gust magnitudes around 27% of the mean flow speed. This paper describes the motivation for developing this gust generator and the work related to its design and testing.
Calcium silicate-carbon nanotube composites
T. Borrmann,K. Edgar,J. L. Spencer,A. J. McFarlane,J. H. Johnston 한국물리학회 2004 Current Applied Physics Vol.4 No.2-4
Composites of calcium silicate and carbon nanotubes have been generated. The nanotubes are multi-walled and grow on catalytichematite particles, which have been deposited on the calcium silicate carrier previously. Randomly curled as well as straightnanotubes have been observed.The nano-structured calcium silicate crystallizes at the elevated temperature and reaction conditions used in the formation of thecarbon nanotubes. The silicate forms wollastonite, therefore reducing the high surface area of the amorphous material. Variouscarbon sources have been explored, which allow catalysis at lower temperatures.