Wind tunnel simulation of wind effect on a group of high Cooling towers
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Aerodynamic interference between high cooling towers in the atmospheric boundary layer (ABL) and uniform flow has been discussed. For the 1/1000 ABL model set up in the 2.25m low speed wind tunnel at Peking University, the similarity condition of the cooling tower in the ABL, the simulation results of a single tower and some typical tower groups have been provided. Experiments showed that the Circumferential pressure distributions were consistent between the smooth model tower and the prototype tower, and between the rough model tower and the prototype tower with ribs; the two dimensional characteristics in the circumferential pressure distribution were also noticeable around the middle 1/3 part of the tower after nondimensionalization by local dynamic pressure. Results demonstrate that, in the flow with strong turbulence the lift coefficient of the downstream cylinder approaches 0.4. In the flow with weak turbulence, the pressure distribution reflects a strong nonsymmetry, and the lift coefficient or stagnation pressure of the downstream cylinder switches alternately between 1 and 0, where a concentrated vortex rolls up and then sheds toward the front of the downstream cylinder and exerts a decisive influence on the aerodynamic properties of the downstream cylinder.
Key Wordsatmospheric boundary layer wind tunnel cooling tower
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- Yan Dachun, Similarity of turbulent characteristics by atmospheric boundary layer simulation. Advance in Mechanics, (in Chinese), to be published.Google Scholar
- Counihan, J., A method of simulating a neutral atmospheric boundary layer in a wind tunnel, AGARD-CP-48(1969).Google Scholar
- Sun Tienfen & Zhou Lianmao, Wind pressure distribution around a ribless hyperbolic cooling tower.J. Wind Engin. and Industr. Aerodyn. 14(1983), 182–192.Google Scholar
- Zdravkovich, M. M.,J. Fluids Engin., Trans. ASME, Series I, 99(1977) 4.Google Scholar