Numerical simulation of thrust generating flow past a pitching airfoil

Sarkar, Sunetra and Venkatraman, Kartik (2006) Numerical simulation of thrust generating flow past a pitching airfoil. In: Computers & Fluids, 35 (1). pp. 16-42.

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Abstract

Earlier analytical and experimental studies predict that pitchingmotions at high frequency can generate thrust on the airfoil. Thepresent work is an effort towards a systematic understanding of theinfluence of various parameters on thrust generation from aharmonically pitching airfoil. Quantitative instantaneous forcecomputations have been discussed together with qualitative vortexpatterns using a 2-D discrete vortex simulation of incompressibleviscous flow. In general, thrust force increases with the oscillationfrequency. The trend is very similar to the inviscid theory prediction.Further, the thrust force is seen to decrease with the increase in meanangle of attack. However, in a clear deviation from inviscid theorytrends, pitching at high amplitudes about high mean angle of attack,only drag is observed for high values of reduced frequency considered.The effect of location of the pitching axis is also found to besignificant on the propulsive characteristics of the airfoil.

Item Type:	Journal Article
Publication:	Computers & Fluids
Publisher:	Elsevier Science Ltd
Additional Information:	Copyright for this article belongs to Elsevier.
Department/Centre:	Division of Mechanical Sciences > Aerospace Engineering(Formerly Aeronautical Engineering)
Date Deposited:	23 Nov 2005
Last Modified:	19 Sep 2010 04:21
URI:	http://eprints.iisc.ac.in/id/eprint/4121

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