Numerical simulation and hydrodynamic visualization of transient viscous flow around an oscillating aerofoil

Daube, Olivier; Phuoc, L. Ta; Dulieu, Annie; Coutanceau, Madeleine; Ohmi, Kazuo; Texier, Alain

doi:10.1002/fld.1650090803

Cited by 5 publications

(1 citation statement)

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“…The theoretical methods of dynamic stall are still limited in their scope and prohibitively expensive in term of computer CPU time. Although Navier-Stokes solvers have been used to simulate dynamic stall (Shida et al [1987], Daube et al [1989], Tuncer et al [1990], and Visbal [1990]), most of the studies were concerned with helicopter retreating-blade stall or agile fighter aircraft and have thus considered pitching airfoils and not the rotation motion encountered by the blades of a Darrieus turbine. That is why our research group, attached to the J.-A.…”

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confidence: 99%

Viscous Flow and Dynamic Stall Effects on Vertical‐Axis Wind Turbines

Allet

Paraschivoiu

1995

International Journal of Rotating Machinery

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The present paper describes a numerical method, aimed to simulate the flow field of vertical-axis wind turbines, based on the solution of the steady, incompressible, laminar Navier-Stokes equations in cylindrical coordinates. The flow equations, written in conservation law form, are discretized using a control volume approach on a staggered grid. The effect of the spinning blades is simulated by distributing a time-averaged source terms in the ring of control volumes that lie in the path of turbine blades. The numerical procedure used here, based on the control volume approach, is the widely known “SIMPLER” algorithm. The resulting algebraic equations are solved by the TriDiagonal Matrix Algorithm (TDMA) in the r- and z-directions and the Cyclic TDMA in the 0-direction. The indicial model is used to simulate the effect of dynamic stall at low tip-speed ratio values. The viscous model, developed here, is used to predict aerodynamic loads and performance for the Sandia 17-m wind turbine. Predictions of the viscous model are compared with both experimental data and results from the CARDAAV aerodynamic code based on the Double-Multiple Streamtube Model. According to the experimental results, the analysis of local and global performance predictions by the 3D viscous model including dynamic stall effects shows a good improvement with respect to previous 2D models.

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confidence: 99%