Title

Flow Visualization of Vortex Shedding Around an Airfoil

Abstract

Experimental data obtained from flow visualization by vortex tagging was used to verify the computational results obtained transient-state solutions of Navier-Stokes equations for vorticity during an impulsively-started flow. Good agreement was reached. The computational method was extended to `steady' state, Karman vortex street was found to occur in the wake of an NACA 0015 airfoil at 40 degrees of angle of attack with Strouhal numbers of 0.27 and 0.32 for Reynolds numbers l03 and 1.04 respectively. The forming and shedding of vortices on the lee side of a structure correspond to the cyclic decrease and increase of local pressures which cause structure fatigue.

Meeting Name

1994 International Mechanical Engineering Congress & Exposition

Department(s)

Mechanical and Aerospace Engineering

Keywords and Phrases

Airfoils; Flow Visualization; Fluid Structure Interaction; Mathematical Models; Navier Stokes Equations; Reynolds Number; Transients; Wakes

Document Type

Article - Conference proceedings

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 1994 American Society of Mechanical Engineers (ASME), All rights reserved.

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