Publication: Caracterización experimental de un flujo turbulento en túnel de viento para la recreación de las condiciones en nubes cálidas
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2011-12
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2011-12-22
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Abstract
El presente Proyecto Fin de Carrera se ha llevado a cabo en la University of Washington como parte de un programa de investigación global que trata de explicar el rápido crecimiento de las gotas observado en las nubes cálidas cuando se forman las precipitaciones y el papel que juega la turbulencia en este fenómeno. Concretamente, en la presente memoria se muestra el estudio que se ha realizado para la caracterización experimental de un flujo turbulento en un túnel de viento y confirmar así que se ajusta a una serie de parámetros definidos previamente con el objetivo de reproducir las condiciones de contorno que se suceden en este tipo de nubes cumulus en la atmósfera. Para este propósito, se recogerán datos de la velocidad del aire con tecnología anemométrica hotwire en diferentes puntos de la sección transversal del túnel para distintas estaciones a lo largo del eje longitudinal del mismo. Finalmente se analizarán los resultados recogidos y se compararán con los parámetros del flujo propuestos con el objetivo de ratificar que en el túnel de viento se recrean las condiciones de turbulencia presentes en este tipo de nubes. __________________________________________________________________________________________________________________________
The present Thesis was done at the University of Washington as a part of a global collaborative research project that aims to explain the fast growth of cloud droplets that leads to precipitation in warm-rain clouds and the influence of turbulence on this phenomenon. This report, specifically, shows the study that was executed to characterize a turbulent flow in a wind tunnel and confirm that it matches a number of previously defined parameters in order to mimick the conditions in these kinds of cumulus clouds. For this purpose, air velocity data were collected with hotwire anemometry at multiple points along the cross section of the tunnel at five distances downstream from a turbulence-inducing grid. Finally, these data were analyzed and compared with the flow parameters proposed with the objective of verifying that the conditions of turbulence in real warm-rain clouds were recreated in the wind tunnel.
The present Thesis was done at the University of Washington as a part of a global collaborative research project that aims to explain the fast growth of cloud droplets that leads to precipitation in warm-rain clouds and the influence of turbulence on this phenomenon. This report, specifically, shows the study that was executed to characterize a turbulent flow in a wind tunnel and confirm that it matches a number of previously defined parameters in order to mimick the conditions in these kinds of cumulus clouds. For this purpose, air velocity data were collected with hotwire anemometry at multiple points along the cross section of the tunnel at five distances downstream from a turbulence-inducing grid. Finally, these data were analyzed and compared with the flow parameters proposed with the objective of verifying that the conditions of turbulence in real warm-rain clouds were recreated in the wind tunnel.
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Mecánica de fluidos, Física de la atmósfera