in this paper, inflow turbulence effects on the flow wake parameters around a naca0012 airfoil at zero incidence angle and reynolds number of 38,700 were investigated. various turbulence promoter networks were used to achieve turbulence intensity of 5% and 6%. experiments have been conducted for three different turbulence intensities in which mean velocity parameters, turbulence intensity, freq...

Natural flight has consistently been the wellspring of many creative minds, yet recreating propulsive systems natural flyers is quite hard and challenging. Regarding design, biomimetics offers a wide variety solutions that can be applied at low Reynolds numbers, achieving high performance maneuverability systems. The main goal current work to computationally investigate thrust-power intricacies...

In this paper, we present h- and hp-adaptive strategies suited for the discontinuous Galerkin formulation of compressible laminar Reynolds-averaged Navier–Stokes equations on unstructured grids, relying a metric-based simplicial remeshing approach. An posteriori error estimator, combining measure energy associated with highest-order modes inter-element jumps, is used to build both metric field ...

ABSTRACT: Inspired by humpback whale’s flippers [1, 2], this study investigated the effect of aspect ratio and shape of protuberances on the performance of airfoil with protuberances on leading edge. NACA0012 foil is used for modifying the leading edge with three different forms and three aspect ratios (1, 2, 3). The experiment of the airfoils was carried out in a low-speed wind tunnel, includi...

Motivated by micro air vehicle applications, a fluid-structure coupling procedure between a NavierStokes solver and a three-dimensional FEM beam solver is presented along with selected results highlighting some of the aerodynamics implications. The fluid model includes laminar, the k ε − turbulence closure, and a filter-based k ε − closure. The structural model is based on an asymptotic approxi...

This experimental works summarize the (1), aeroacoustic results of airfoil self-noise generated at Reynolds numbers between 1.0 x 10 and 6.0 x 10. The test facility is a newly built low noise and low flow turbulence open jet wind tunnel, where a NACA0012 airfoil was mounted to the exit nozzle horizontally. The noise measurements were performed at three effective angles of attack at 0.0, 1.4 and...

We report on recent progress and validation of a 3D hybrid model for naval hydrodynamics problems based on a perturbation method, in which both velocity and pressure are expressed as the sum of an inviscid flow with a viscous perturbation. The farto near-field inviscid flows can be solved with a Boundary Element Method (BEM), based on fully nonlinear potential flow theory, and the near-field pe...

An efficient overlapping-mesh method for Euler flow solvers is developed and applied to two-body flow field problems. It features simple procedures to determine the interface cells on which the flow quantities are to be transferred from one mesh system to the other. This allows a great flexibility of mesh arrangements. The method is applied to two cases; one is the transonic flow field around v...