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| Format: | Artículo científico |
| Sprache: | en |
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Academia Brasileira de Ciências
2015
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| Online-Zugang: | https://www.redalyc.org/articulo.oa?id=32739721050 |
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Inhaltsangabe:
- An Investigation of a Mathematical Model for the Internal Velocity Profile of Conical Diffusers Applied to DAWTs DISTERFANO L.M. BARBOSA JERSON R.P. VAZ SÁVIO W.O. FIGUEIREDO MARCELO DE OLIVEIRA E SILVA ERB F. LINS ANDRÉ L.A. MESQUITA Multidisciplinaria (Ciencias Naturales y Exactas) Biot DAWTs diffusers wind energy Savart's law The Diffuser Augmented Wind Turbines (DAWTs) have been widely studied, since the diffusers improve the power coefficient of the wind turbine, particularly of small systems. The diffuser is a device which has the function of causing an increase on the flow velocity through the wind rotor plane due to pressure drop downstream, therefore resulting in an increase of the rotor power coefficient. This technology aids the turbine to exceed the Betz limit, which states that the maximum kinetic energy extracted from the flow is 59.26%. Thus, the present study proposes a mathematical model describing the behavior of the internal velocity for three conical diffusers, taking into account the characteristics of flow around them. The proposed model is based on the Biot-Savart's Law, in which the vortex filament induces a velocity field at an arbitrary point on the axis of symmetry of the diffusers. The results are compared with experimental data obtained for the three diffusers, and present good agreement. 2015 artículo científico 0001-3765 https://www.redalyc.org/articulo.oa?id=32739721050 en http://www.redalyc.org/revista.oa?id=327 Anais da Academia Brasileira de Ciências application/pdf Academia Brasileira de Ciências Anais da Academia Brasileira de Ciências (Brasil) Num.2 Vol.87