Resumo

ROMANTCHIK-KRIUCHKOVA, Eugenio; SANTOS-HERNANDEZ, Alberto Mauricio; RIOS-URBAN, Eduardo  e  TERRAZAS-AHUMADA, Diego. Air flow analysis of greenhouse extractors using CFD simulation. Ing. invest. y tecnol. [online]. 2019, vol.20, n.1. ISSN 2594-0732.  https://doi.org/10.22201/fi.25940732e.2019.20n1.012.

To analyze the air flow in the air extraction system installed in a greenhouse, a set of extractors with different number and width of blades, angle of attack of the air and angular velocity was designed. Subsequently, 48 simulations were performed by computational fluid dynamics based on different boundary conditions. The resolution of the three-dimensional model was based on numerically solving Navier-Stokes flow equations by means of a finite volume discretization method. In addition, for each study variant 48 2D images of velocity contours and another 48 in 3D of the output air flow stream lines were obtained, and velocity and pressure curves were built with respect to geometry system and extractor power was estimated. Finally, values of the air opening angle at exit of the extractor and the angle of flow inside the duct were obtained. The objective of this investigation was to apply the simulation by computational fluid dynamics in a greenhouse air extraction system, to later analyze the flow behavior at exit of the tunnel, according to geometric parameters of the extractor. With this information, greenhouse ventilation systems can be designed, as well as control the air flow according to the conditions required by the interest crop, without affecting its growth cycle and regardless of local climatology.

Palavras-chave : Ventilation; alternative sources; energy; computer modeling; wind tunnel.

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