On Modeling of Atmospheric Surface Layers by the Counter - Jets Technique - Preliminary Results.
ILLINOIS INST OF TECH CHICAGO DEPT OF MECHANICS MECHANICAL AND AEROSPACE ENGINEERING
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Thick turbulent boundary layers intended to simulate neutral atmospheric layers are generated in wind tunnels by the natural long-fetch technique in long tunnels and by various drag-and turbulence-producing obstructions in short tunnels. The target atmospheric layers actually consist of a succession of quasi-equilibrium boundary layers diffusing within older boundary layers as the ground roughness and topography change. Some philosophy for testing of aerodynamic characteristics of models of proposed buildings is drawn from comparison of the above layers. Author Modified Abstract