Drag on a windbreak in two-dimensional flow

✍ Scribed by Ido Seginer; Ram Sagi

• Publisher: Elsevier Science
• Year: 1971
• Weight: 526 KB
• Volume: 9
• Category: Article
• ISSN: 0002-1571
• DOI: 10.1016/0002-1571(71)90031-8

✦ Synopsis

A method has been proposed for calculating the drag force and the moment exerted by the wind on a windbreak placed perpendicularly to the wind direction. The balance of forces and of moments on a carefully selected control volume with faces far enough from the windbreak, yields very simple, if approximate equations for the determination of the drag and the moment, utilizing pressure and shear measurements at the surface. For aerodynamically rough surfaces, the shearing stress can be deduced from wind measurements near the surface along a line perpendicular to the windbreak. Existing experimental wind data from the literature have been used to illustrate the proposed method, leading to a discussion of possible reasons for the discrepancy between measured and calculated results. Field experiments must be carried out before the method can be adopted for use.