Viscous Flow Around a Transversally Oscillating Elliptic Cylinder

概要

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To furnish some fundamental information about viscous effects of flow on the aerodynamic characteristic of an elliptic cylinder, we numerically solve the Navier-Stokes equations for flow around both stationary and transversally oscillating elliptic cylinders at Reynolds numbers of R_e=40 and 80,and also measure aerodynamic forces and pressure acting on an elliptic cylinder in the range of Reynolds numbers R_e=40 to 20000. There is consequently seen a good agreement between the calculated results and the experimental ones for steady and unsteady aerodynamic parameters at Reynolds numbers R_e=40 and 80. On the basis of the numerical results we examine the timevariation of flow pattern around an elliptic cylinder, e.g. locations of stagnation points, and the experimental ones we discuss the effects of angle of attack, Reynolds number and oscillatory frequency on aerodynamic parameters.
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