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| Design, construction,
and testing of an active grid turbulence generator ABSTRACT: An active grid turbulence generator was designed, constructed and tested in the Corrsin wind tunnel. In order to allow us to achieve high Reynolds number, isotropic turbulence, the active grid was designed to operate at higher mean velocity and rotational speeds that previous grids described in the existing literature. Tests with a single hot-wire at x/M=20 show a reasonably uniform mean and RMS velocity distribution (up to about 20%). Streamwise energy spectra along the centerline at various x/M show an inertial range extending to almost two decades with a Taylor-scale Reynolds number exceeding 800. Several modifications to the grid are suggested and potention changes in experimental setup are proposed to improve the spatial uniformity of the flow across the test section. § Archival Journal Publications: Articles may be downloaded for personal use only! |
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Charles Meneveau, Department of Mechanical Engineering, Johns Hopkins University, 3400 N. Charles Street, Baltimore MD 21218, USA, Phone: 1-410-516-7802, Fax: 1-(410) 516-7254, email: meneveau@jhu.edu |
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Last
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08/30/2008
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