Publicación: Estudio numérico del desempeño de una turbina Tesla con fluidos newtonianos y no newtonianos
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2024-10-22
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info:eu-repo/semantics/openAccess
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Universidad Nacional de Educación a Distancia (España), Universidad de Concepción - Chile. Departamento de Ingeniería Mecánica
Resumen
En el presente trabajo se realiza un estudio del desempeño de una turbina Tesla con fluidos newtonianos y no newtonianos mediante la aplicación del modelo de Ostwald-de Waele (ley de potencia). Se desarrollaron distintas simulaciones con ANSYS Fluent. Para abordar el problema se generó un submodelo del sistema considerando el flujo entre dos discos con sus fronteras sólidas y lisas, esté se discretizó con la ayuda de ICEM CFD mediante un mallado estructurado y fino. Para capturar los efectos de capa límite sobre los discos se seleccionó el modelo matemático: “K-omega SST” para la validación de la malla y el modelo “laminar” para las simulaciones del modelo viscoso no lineal (no newtoniano). Las características del fluido y las dimensiones geométricas de la turbina se tomaron de experimentos realizados anteriormente por Rice [6]. Los resultados muestran que el mejor fluido para su aplicación en la turbina Tesla bajo las mencionadas consideraciones y para bajas velocidades de rotación del eje (ω ≤ 10000 rpm), es el newtoniano.
In this work, a study of the performance of a Tesla turbine with Newtonian and non-Newtonian fluids is carried out by applying the Ostwald-de Waele (power law) model. Different simulations were developed with ANSYS Fluent. To address the problem, a submodel of the system was generated considering the flow between two disks with their solid and smooth boundaries, which was discretized with the help of ICEM CFD using a fine and structured mesh. To capture the boundary layer effects on the disks, the mathematical model: “K-omega SST” was selected for the mesh validation and the “laminar” model for the simulations of the non-linear viscous model (nonNewtonian). The characteristics of the fluid and the geometric dimensions of the turbine were taken from experiments previously carried out by Rice [6]. The results show that the best fluid for application in the Tesla turbine under the aforementioned considerations and for low shaft rotation speeds (ω ≤ 10000 rpm), is the Newtonian one.
In this work, a study of the performance of a Tesla turbine with Newtonian and non-Newtonian fluids is carried out by applying the Ostwald-de Waele (power law) model. Different simulations were developed with ANSYS Fluent. To address the problem, a submodel of the system was generated considering the flow between two disks with their solid and smooth boundaries, which was discretized with the help of ICEM CFD using a fine and structured mesh. To capture the boundary layer effects on the disks, the mathematical model: “K-omega SST” was selected for the mesh validation and the “laminar” model for the simulations of the non-linear viscous model (nonNewtonian). The characteristics of the fluid and the geometric dimensions of the turbine were taken from experiments previously carried out by Rice [6]. The results show that the best fluid for application in the Tesla turbine under the aforementioned considerations and for low shaft rotation speeds (ω ≤ 10000 rpm), is the Newtonian one.
Descripción
Organizado y patrocinado por: Federación iberoamericana de Ingeniería Mecánica y Universidad de Concepción - Chile. Departamento de Mecánica, FeIbIm – FeIbEM
Categorías UNESCO
Palabras clave
Turbina Tesla, Fluido newtoniano, Fluido no newtoniano, Modelo Ostwald-de Waele, Tesla turbine, Newtonian fluid, non-Newtonian fluid, Ostwald-de Waele model
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E.T.S. de Ingenieros Industriales
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Mecánica