HANNOVER MESSE 2018, 23 - 27 April
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tech transfer Forum

Rays and Lotus: Models for drag reduction of the OpenROV

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Hall 2, Stand C02



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Research & Technology

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tech transfer Forum

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The exploration of the oceans with Autonomous Underwater Vehicle (AUV) and Remotely Operated Vehicle (ROV) is a cost-effective alternative to manned submarines. A reasonable assembly set is the OpenROV, whose shape gives rise to drag optimization. For this purpose, rays were chosen as biological role models and were abstracted into a new hull design in an iterative design process. To further decrease the drag, the effect of an air layer, which is due to the Cassie-Baxter-State, was investigated. Wind tunnel experiments and simulations show a drag reduction up to 50%, compared to the original design. Water tunnel experiments combined with Particle Image Velocimetry (PIV) reveal that the fluid next to the air layer is significantly less decelerated. This results in a reduced velocity gradient in the boundary layer and therefore less energy dissipation caused by friction.


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