Abstract
This paper describes a detailed study of the flow structure over repeated two-dimensional flat plates on a ground plane for various values of S/D, and the optimum value of S/D to augment the turbulence intensity near the ground plane. The pitch between the two adjoining flat plates was varied at S/D=2, 4, 8, 12, and 16. The time-mean velocity and turbulence intensity were measured by Laser Doppler Velocimeter. As a result, it is concluded that (i) the flow structure over the repeated two-dimensional flat plate is divided into two types due to the reattachment of streamline left from the top edge of the flat plate on the groove between two plates, and (ii) S/D=8 is optimum to augment the turbulence intensity in the groove between flat plates, when the two-dimension flat plates are aligned on the wall as a turbulence promoter.
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