Picture map of Europe with pins indicating European capital cities

Open Access research with a European policy impact...

The Strathprints institutional repository is a digital archive of University of Strathclyde's Open Access research outputs. Strathprints provides access to thousands of Open Access research papers by Strathclyde researchers, including by researchers from the European Policies Research Centre (EPRC).

EPRC is a leading institute in Europe for comparative research on public policy, with a particular focus on regional development policies. Spanning 30 European countries, EPRC research programmes have a strong emphasis on applied research and knowledge exchange, including the provision of policy advice to EU institutions and national and sub-national government authorities throughout Europe.

Explore research outputs by the European Policies Research Centre...

Numerical investigation of angle of attack profile on propulsion performance of an oscillating foil

Xiao, Qing and Liao, Wei (2010) Numerical investigation of angle of attack profile on propulsion performance of an oscillating foil. Computers and Fluids, 39 (8). 1366–1380. ISSN 0045-7930

Full text not available in this repository. Request a copy from the Strathclyde author

Abstract

Effects of effective angle of attack (AOA) profile on an oscillating foil thrust performance are studied using a computational method. The foil is subject to a combined pitching/plunging motion with effective AOA satisfying a harmonic cosine function. To achieve this, either the pitching or plunging motion is modified from the conventional harmonic sinusoids. Investigations are performed over a series of Strouhal numbers (St), three maximum effective angles of attack and three different phase angles between pitching and plunging. It is shown that the degradation of thrust force and efficiency with sinusoidal pitching/plunging oscillation, at higher St, is effectively alleviated or removed when the AOA is imposed as a cosine profile. The improvement is more significant for the phase angle being different from 90degrees. A better performance is obtained with the imposed modification on pitching motion. The stronger reversed Von Karman vortex wake associated with leading-edge vortex development is observed with the modified motions, which is believed to induce the improved thrust performance.