In the base station antennas or other outdoor products industries, developers usually do not possess fluid mechanics or simulation analysis capabilities. The structural strength requirement of the product can only be estimated based on the existing data or some simple formulas. The wind tunnel experiments or the simple static wind load tests can be conducted only after the product design is completed. If these tests reveal wind loading problems, the design must be modified. This will cause the delay in product development, and the development costs will increase. Thus engineers tend to over-design their product to reduce the risk factor, but this will result in the cost of the product to rise and eventually lose market competitiveness.

The goal of this study is to understand the aerodynamic effects of changes in the external shape, such as arc, fillet, and length, of a bluff body in the atmosphere, in order to help engineers assess the wind loading on outdoor product design. Engineers can refer to the results of the present research to determine the structural requirements of new products or to optimize the designs of existing products and reduce costs.


▲Composite grid

▲Pressure contours

▲Velocity vectors 

▲Turbulence contours ( 2 D)

▲Turbulence contours ( 3 D)

▲Wind tunnel experimental model