Estudio de simulación numérica estacionaria del flujo en el modelo de turbina Fancis Tokke, en diferentes condiciones de operación
Data
2018-10-25
Autores
Chumpitaz Huamaní, Anthony Jair
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Resumo
Este trabajo investiga el flujo en el modelo a escala de la turbina Francis Tokke a carga parcial, mejor punto de eficiencia y alta carga, donde los datos iniciales y experimentales son contribución del primer y segundo Workshop Francis-99. El trabajo se basa en el software Ansys CFX, que es un software de Dinámica de Fluidos Computacionales (CFD) que contiene características para simulaciones en maquinaria rotativa. Se utiliza la variante de modelo de turbulencia SST. Se realizan simulaciones utilizando un acoplamiento de interfaz Stage, incluida también interfaz de periodicidad en el rotor y los distribuidores móviles, desde la entrada hasta la carcasa espiral hasta la salida del tubo de aspiración. Las simulaciones realizadas son de estado estacionario las cuales dan buenas predicciones de la distribución de presión en la turbina en comparación con los resultados experimentales. Los perfiles de velocidad en la salida del corredor están bien predichos en las 3 condiciones. Sin embargo, algunas pequeñas incongruencias de datos entre los experimentales se forman por motivos ya sea numéricos o condiciones que no son tomadas en cuenta. Las simulaciones de estado estacionario sobreestiman fuertemente la eficiencia, dan buenas predicciones en el mejor punto de eficiencia (error de 2.1%), alta carga (1.4%) y con errores mayores a carga parcial (4.1%).
This work investigates the flow in the scale model of the Francis Tokke turbine at partial load, better point of efficiency and high load, where the initial and experimental data are contributions of the first and second Francis- 99 Workshop. The work is based on the Ansys CFX software, which is a computational fluid dynamics (CFD) software that contains features for simulations in rotating machinery. The variant of the turbulence model SST is used. The simulations are carried out using a interface Stage, also a periodicity interface in the rotor and the mobile distributors, from the entrance to the housing to the outlet of the suction pipe. The simulations carried out are of steady state which give good predictions of the pressure distribution in the turbine compared to the experimental results. The speed profiles at the exit of the corridor are well predicted in the 3 conditions. However, some small data incongruencies between the experimental ones are formed for reasons either numerical or conditions that are not taken into account. Stationary state simulations strongly overestimate efficiency, give good predictions at the best efficiency point (error of 2.1%), high load (1.4%) and with higher errors at partial load (4.1%)
This work investigates the flow in the scale model of the Francis Tokke turbine at partial load, better point of efficiency and high load, where the initial and experimental data are contributions of the first and second Francis- 99 Workshop. The work is based on the Ansys CFX software, which is a computational fluid dynamics (CFD) software that contains features for simulations in rotating machinery. The variant of the turbulence model SST is used. The simulations are carried out using a interface Stage, also a periodicity interface in the rotor and the mobile distributors, from the entrance to the housing to the outlet of the suction pipe. The simulations carried out are of steady state which give good predictions of the pressure distribution in the turbine compared to the experimental results. The speed profiles at the exit of the corridor are well predicted in the 3 conditions. However, some small data incongruencies between the experimental ones are formed for reasons either numerical or conditions that are not taken into account. Stationary state simulations strongly overestimate efficiency, give good predictions at the best efficiency point (error of 2.1%), high load (1.4%) and with higher errors at partial load (4.1%)
Descrição
Trabalho final apresentado como parte das exigências para a obtenção do título de Bacharel em Engenharia de Energia pela Universidade Federal da Integração Latino-Americana. Orientador: Dr. Walber Ferreira Braga
Palavras-chave
Turbina Francis Tokke, Dinámica de Fluidos computacionales (CFD), Software Ansys CFX
Citação
CHUMPITAZ HUAMANÍ, Anthony Jair. Estudio de simulación numérica estacionaria del flujo en el modelo de turbina Fancis Tokke, en diferentes condiciones de operación. 2018. 12 p. Artigo científico de conclusão de curso (Engenharia de Energia) - Universidade Federal da Integração Latino-Americana (Unila), Foz do Iguaçu, 2018