Evaluación de modelos de turbulencia para el flujo de aire en una tobera plana

Contenido principal del artículo

San Luis Baudilio Tolentino Masgo http://orcid.org/0000-0001-6320-6864

Keywords

flujo de aire, modelos de turbulencia, onda de choque, presión estática, tobera plana, velocidad supersónica

Resumen

En los flujos de gas a velocidades supersónicas se producen ondas de choque, separación del flujo y turbulencia debido a cambios repentinos de la presión. El comportamiento del flujo compresible se puede estudiar mediante equipos experimentales o por métodos numéricos con códigos de la dinámica de fluidos computacional (DFC). En el presente trabajo, el flujo de aire se simula en un dominio computacional 2D con el código ANSYS-Fluent versión 12.1 para la geometría de una tobera plana, utilizando la ecuación de Navier-Stokes de número de Reynolds promedio (NSRP), con el objetivo de evaluar cinco modelos de turbulencia: SST k-ω, k-e estándar, k-ω estándar, k-kl-ω de transición y RSM. Se obtuvieron resultados numéricos de perfiles de presión estática para las paredes de la tobera y de formas de ondas de choque en el campo de flujo, para dos condiciones de relaciones de presión y , los cuales fueron comparados con los datos experimentales del trabajo de Hunter. Se concluye que los resultados numéricos obtenidos con el modelo de turbulencia SST k-ω de Menter (1994) están más ajustados a los datos experimentales de presión estática y de formas de ondas de choque.
 
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Citas

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