Computational Study Of Diffuser Augmented Wind Turbine Using Actuator Disc Force Method

In this paper, a computational approach, based on the solution of Reynolds-averaged-Navier–Stokes (RANS) equations, to describe the flow within and around a diffuser augmented wind turbine (DAWT) is reported. In order to reduce the computational cost, the turbine is modeled as an actuator disc (AD) that imposes a resistance to the passage of the flow. The effect of the AD is modeled applying two body forces, upstream and downstream of the AD, such that they impose a desired pressure jump. Comparison with experiments carried out in similar conditions shows a good agreement suggesting that the adopted methodology is able to carefully reproduce real flow features.

[1]  Niels N. Sørensen,et al.  Actuator Disc Model Using a Modified Rhie-Chow/SIMPLE Pressure Correction Algorithm: Comparison with Analytical Solutions , 2008 .

[2]  Masahiro Inoue,et al.  Development of a shrouded wind turbine with a flanged diffuser , 2008 .

[3]  Niels N. Sørensen,et al.  The k‐ε‐fP model applied to double wind turbine wakes using different actuator disk force methods , 2015 .

[4]  Eric Bibeau,et al.  A numerical investigation into the effect of diffusers on the performance of hydro kinetic turbines using a validated momentum source turbine model , 2010 .

[5]  Clarissa S. K. Belloni,et al.  Hydrodynamics of ducted and open-centre tidal turbines , 2013 .

[6]  O. Igra,et al.  Research and development for shrouded wind turbines , 1981 .

[7]  V. Bussel.  An assessment of the performance of diffuser augmented wind turbines (DAWT's) , 1999 .

[8]  R. Flemming,et al.  Actuator Disc Methods Applied to Wind Turbines , 2016 .

[9]  Jochen Wiedemann,et al.  On the Correction of Interference Effects in Open Jet Wind Tunnels , 1996 .

[10]  A. Price,et al.  6th European Wave and Tidal Energy Conference , 2005 .

[11]  B. Koren,et al.  Review of computational fluid dynamics for wind turbine wake aerodynamics , 2011 .

[12]  Derek Grant Phillips.  An investigation on diffuser augmented wind turbine design , 2003 .

[13]  van Gjw Gerard Bussel,et al.  The science of making more torque from wind: Diffuser experiments and theory revisited , 2007 .

[14]  A. Bahaj,et al.  Comparison between CFD simulations and experiments for predicting the far wake of horizontal axis tidal turbines , 2010 .

[15]  Francesco Castellani,et al.  Wake Modeling with the Actuator Disc Concept , 2012 .

[16]  D. Ragni,et al.  Experimental analysis of the wake of a horizontal-axis wind-turbine model , 2014 .