The effect of the gap between endplates and wing sections on aerodynamic lift and drag forces was investigated. This was studied in order to determine the maximum gap distance at which flow can still be considered two-dimensional, and tip effects can be neglected. A non-dimensional distance, λ, was defined as the ratio of gap distance, d, to laminar boundary layer thickness, δt,laminar , over t...

The goal of this paper is to investigate and develop fast and robust solution techniques for high-order accurate Discontinuous Galerkin discretizations of non-linear systems of conservation laws on unstructured meshes. Previous work was focused on the development of hp-multigrid techniques for inviscid flows and the current work concentrates on the extension of these solvers to steady-state vis...

The hydrodynamics and energetics of bioinspired oscillating mechanisms have received significant attentions by engineers and biologists to develop the underwater and air vehicles. Undulating and pure heaving (or plunging) motions are two significant mechanisms which are utilized in nature to provide propulsive, maneuvering, and stabilization forces. This study aims to elucidate and compare the ...

In the present paper, a stable Spectral Difference formulation on triangles is defined using flux polynomial expressed in Raviart-Thomas basis up to sixth-order of accuracy. Compared literature approach, work increases order accuracy that can deal with. The proposed scheme based set points paper. sets leading are determined Fourier stability analysis linear advection equation coupled with an op...

Rüzgar türbinlerinde kanat profili seçimi türbinin aerodinamik performansı açısından çok önemlidir. Bu çalışmada dikey eksenli H-Darrieus rüzgar simetrik ve asimetrik kullanımının türbin verimine olan etkisi sayısal olarak incelenmiştir. Beş (NACA0009, NACA0012, NACA0015, NACA0018, NACA0021) ile beş profilinin (NACA2412, NACA4412, NACA6412, NACA8412, NACA10412) türbininde kullanılması durumunda...

Abstract In this paper, a Moving-Least-Squares (MLS)-based immersed boundary method (IBM) for simulating viscous compressible flows is proposed. For method, the lattice Boltzmann flux solver (LBFS) used to solve flow field on Eulerian mesh and MLS-based IBM introduced in present paper implement condition. The discrete Lagrangian points are represent Solid boundaries. A second-order MLS interpol...

The vortex force map (VFM) method is a promising low-cost technique for predicting unsteady aerodynamic load from the vorticity field. Developed under potential flow assumption and applied to high-resolution computational fluid dynamics (CFD) data, original VFM needs be further explored viscous flows, especially at low Reynolds numbers with incomplete knowledge of data. In this paper, extended ...

Abstract A novel approach is devised for the quantification of systematic uncertainty due to peak locking in particle image velocimetry (PIV), which also leads correction peak-locking errors. The approach, applicable statistical flow properties such as time-averaged velocity and Reynolds stresses, relies on recordings with multiple time separations Δ t a least-squares regression measured quanti...

Abstract The transition characteristics of dynamic airfoil have significant effects on the aerodynamic performance wind turbines, helicopter rotor blades, jet engine compressor etc. time domain and time-frequency a NACA0012 during its pitching oscillation were experimentally studied using wall pressure measurement technology with high accuracy in this paper. variable slip window was used to det...