This paper presents a result of wind tunnel test for investigating the aerodynamic characteristics of a net . The variation of wind force and moment with wind direction are clarified. The wind flow statistics behind the net was also obtained by a hot wire anemometer. The following result was derived from the measurement of the test net only and that with surrounding net. The wind force and moment coefficients were obtained. We propose the wind force coefficient for the wind-resistant design of net from the result of measurement.
Drag and base pressure of axial circular cylinder with a 110mm diameter model were measured without any support interference, utilizing the JAXA 60cm MSBS (Magnetic Suspension and Balance System) at speeds from 8m/s to 15m/s. The drag coefficient depended on the fineness ratio of the cylinder (1.27-1.79) but not on the Reynolds number within the tested range (45,000-110,000). The drag coefficient took a minimum value around the fineness ratios from 1.6 to 1.8. The base pressure coefficient took a maximum value around the same fineness ratio region and showed Reynolds number dependency at fineness ratios from 1.27 to 1.55 but not at the ratios from 1.65 to 1.79.