Preprint Article Version 1 This version is not peer-reviewed

Modication of Prandtl Wind Tunnel

Version 1 : Received: 7 December 2018 / Approved: 7 December 2018 / Online: 7 December 2018 (17:33:33 CET)

How to cite: Sun, B. Modication of Prandtl Wind Tunnel. Preprints 2018, 2018120096 Sun, B. Modication of Prandtl Wind Tunnel. Preprints 2018, 2018120096


Wind tunnels are devices that enable researchers to study the flow over objects of interest, the forces acting on them and their interaction with the flow, which is nowadays playing an increasingly important role due to noise pollution. Since the first closed circuit wind tunnel with variable cross-section was built in G¨ottingen, its Prandtl configuration has little change. The wind tunnel with Prandtl configuration has four corners and vanes, more than 50% of the total pressure loss are caused by the corners and vanes. How to reduce the total pressure loss is a world class problem in the wind tunnel design. This study attempts to propose a novel configuration of wind tunnel, where the corners have been replaced by semi-circular tunnel. Sun wind tunnel 2 has only two corners and vanes, while Sun wind tunnel 1 has no  corners and vanes at all. It is expected the new wind tunnel can reduce the total pressure loss from 50% to 10%.

Subject Areas

Wind tunnel, Prandtl’s configuration, corners, vortex, turbulence, pressure loss

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