Drag Reduction and Secondary-Flow Occurrence by Square Biplane Grid
Drag Reduction and Secondary-Flow Occurrence by Square Biplane Grid作者机构：Department of Mechanical and Energy Systems Engineering Oita University Oita Japan
出 版 物：《Open Journal of Fluid Dynamics》 (流体动力学（英文）)
年 卷 期：2018年第8卷第1期
页 面：78-85页
学科分类：08[工学] 0801[工学-力学（可授工学、理学学位）]
主 题：Biplane Grid Circular Cylinders Surface Pressure Distribution Drag Coefficient Flow Visualization
摘 要：In this paper, the characteristics of the three-dimensional flow field around the circular cylinder members forming a square biplane grid were experimentally investigated by using a wind tunnel and a water tunnel. In the wind tunnel testing, the span wise and circumference pressure distributions of surface on the circular cylinder were measured on the center mesh members formed by biplane grid in detail. Local drag coefficient was calculated from the surface pressure distributions. In addition, the flow visualization was performed in the water tunnel. As a result, it was suggested that the flow penetrating the contact region produced secondary-flow behind the biplane grid. Accordingly, the drag reduction would be caused by the presence of the secondary-flow.
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