The aim of this work is to exploit flow-induced vibration for energy harvesting. A cantilever beam carrying a tip mass in the form of a lightweight box having a square, triangular, or semicircular cross-section is designed to undergo galloping oscillations when subjected to an incoming wind stream. Electrical power is extracted from the self-excited flexural vibration of the beam through an ele...

in this paper, the interactions of flow over two circular or rectangular cylinders, passing by each other, have been investigated, using overset grids method. two-dimensional incompressible governing fluid flow equations are solved using finite volume method. in this research, several interpolation methods have been tested to transfer data between grids. one of them called mass flux base interp...

flow structure and heat transfer characteristics around two-equal in-tandem square cylinders in the two dimensional laminar and turbulent flow regimes are simulated numerically for reynolds and prandtl numbers, re=1-1×10 5 , pr=0.71, respectively. the investigation is based on an implicit finite volume scheme for integrating the unsteady navier-stokes equations and use of standard κ-ε model to ...

Recently there has been an increasing interest for a better understanding of ultra low Reynolds number ‡ows. In this context we present a new setup which allows to e¢ ciently solve the stationary incompressible Navier-Stokes equations in an exterior domain in three dimensions numerically. The main point is that the necessity to truncate for numerical purposes the exterior domain to a …nite sub-...

Unmanned aerial vehicles (UAVs) performing their operations for a long time have been attracting much attention in military and civil aviation industries for the past decade. The applicable field of UAV is changing from the military purpose only to the civil one. Because of their low operation cost, high reliability and the necessity of various application areas, numerous development programs h...

Animals exhibit various physiological and behavioural strategies for minimizing travel costs. Fins of aquatic animals play key roles in efficient travel and, for sharks, the functions of dorsal and pectoral fins are considered well divided: the former assists propulsion and generates lateral hydrodynamic forces during turns and the latter generates vertical forces that offset sharks' negative b...

The design of wind turbines requires a deep insight into their complex aerodynamics, such as dynamic stall single airfoil and flow vortices. calculation the aerodynamic forces on turbine blade at different angles attack (AOAs) is fundamental task in blades. accurate efficient (lift drag) prediction an are challenging tasks. Computational fluid dynamics (CFD) able to provide better understanding...

This paper presents an unsteady flow analysis of a 3D wing with morphing trailing edge flap (TEF) and seamless side-edge transition between the morphed static parts by introducing parametrization method. First, steady Reynolds-averaged Navier–Stokes (RANS) statically TEF is performed results are compared both baseline clean traditional hinged configuration at Reynolds number 0.7 × 106 for range...

The main purpose of this article is the structural analysis of a composite blade of a selected helicopter. In this study, the stresses on rotors' blades caused by centrifugal forces, lift, drag and torque are analyzed. The governing equations of the structure behavior and solving processes were carried out by MATLAB software, and simulation is carried out by ABAQUS software, and they are compar...

A passive jet flow control method was employed to suppress the unsteady vortex shedding from a circular cylinder at the Reynolds number level of Re= (0.18~1.1)×10. The passive jet flow control was achieved by blowing jets from the holes near the rear stagnation point of the cylinder, which are connected to the in-take holes located near the front stagnation point through channels embedded insid...