Euler Solutions of Flow Around a Rectangular Wing with Square Tip

Abstract

Low speed flows about a high-lift rectangular wing with square lateral tip are computed by a three-dimensional compressible Euler flow solver. Flow separation around the square tip of the wing is studied. The flow is, otherwise, attached to the surface of the wing. The pressure distributions over the upper and lower surfaces of the wing, especially on the outer portion of the wing and the generation and evolution of the tip vortices in the near field of the wing are computed by the Euler method and validated by a comprehensive wind-tunnel test data in the literature. The effects of the wind-tunnel wall are not considered in the computations.

Assessment of Scale Effects, Viscous Forces and Induced Drag on a Point-Absorbing Wave Energy Converter by CFD Simulations

“…The Euler equations differ from potential flow in that they support flow rotation (i.e., vorticity). The Euler method has been widely used to model the primary tip vortex of air-craft wings at high angles of attack [39,40], by utilizing the numerical viscosity from the discretisation as an inherent trigger of vorticity generation. There are no shear stresses on walls in the Euler simulations so there is no boundary layer separation effects, but close to regions of high wall curvature (such as the bottom corner of the truncated cylinder) the high gradients of pressure and velocity generate vortex shedding.…”