WIT Press

FLOW PATTERN ALTERATION NEAR A HYDROFOIL DUE TO EFFECTIVE SLIP: AN EXPERIMENTAL STUDY

Price

Free (open access)

Paper DOI

10.2495/CMEM-V4-N4-493-501

Volume

Volume 4 (2016), Issue 4

Pages

8

Page Range

493 - 501

Author(s)

SALIL GOGTE, ANDREA MAMMOLI & PETER VOROBIEFF

Abstract

We present an experimental investigation of water flow around a hydrofoil with a superhydrophobic patterned surface. The experimental setup uses a water tunnel to measure the drag over the hydrofoil and acquire velocity field measurements using particle image velocimetry (PIV). Drag reduction on the order of 10% or higher was observed on hydrofoils with irregular surface textures combined with super-hydrophobic coating, leading to effective Navier slip on the surface. However, we report that other macroscopic flow characteristics, including the stall angle, are also changed by application of the coating.

Keywords

drag reduction, experiment, particle image velocimetry, stall, superhydrophobic surface