JavaScript is disabled for your browser. Some features of this site may not work without it.

    Listar

    Todo RIUMAComunidades & ColeccionesPor fecha de publicaciónAutoresTítulosMateriasTipo de publicaciónCentrosEsta colecciónPor fecha de publicaciónAutoresTítulosMateriasTipo de publicaciónCentros

    Mi cuenta

    AccederRegistro

    Estadísticas

    Ver Estadísticas de uso

    DE INTERÉS

    Datos de investigaciónReglamento de ciencia abierta de la UMAPolítica de RIUMAPolitica de datos de investigación en RIUMASHERPA/RoMEODulcinea
    Preguntas frecuentesManual de usoDerechos de autorContacto/Sugerencias
    Ver ítem 
    •   RIUMA Principal
    • Investigación
    • Ingeniería Mecánica, Térmica y de Fluidos - (IMTF)
    • IMTF - Tesis
    • Ver ítem
    •   RIUMA Principal
    • Investigación
    • Ingeniería Mecánica, Térmica y de Fluidos - (IMTF)
    • IMTF - Tesis
    • Ver ítem

    Experimental study in near-and far-field of trailing vortices and their active control

    • Autor
      García Ortiz, José Hermenegildo
    • Director/es
      Del-Pino-Peñas, Carlos ManuelAutoridad Universidad de Málaga; Parras-Anguita, LuisAutoridad Universidad de Málaga
    • Fecha
      2017-10-17
    • Editorial/Editor
      UMA Editorial
    • Departamento
      Ingeniería Mecánica, Térmica y de Fluidos
    • Palabras clave
      Aerodinámica - Tesis doctorales
    • Resumen
      In order to predict the axial development of the wingtip vortices strength, an accurate theoretical model is required. Several experimental techniques have been used to that end, e.g. PIV or hotwire anemometry, but they imply a significant cost and effort. For this reason, we have carried out experiments using the smokewire technique to visualize smoke streaks in six planes perpendicular to the main stream flow direction. Using this visualization technique, we obtained quantitative information regarding the vortex velocity field by means of Batchelor’s model for two chord based Reynolds numbers, ������ = 3.33 ⋅ 104 and 105. Therefore, this theoretical vortex model has been introduced in the integration of ordinary differential equations which describe the temporal evolution of streak lines as a function of two parameters: the swirl number, ��, and the virtual axial origin, ��0. We have applied two different procedures to minimize the distance between experimental and theoretical flow patterns: individual curve fitting at six different control planes in the streamwise direction as well as the global curve fitting which corresponds to all the control planes simultaneously. Both sets of results have been compared with those provided by del Pino et al. [2011a], finding good agreement. Finally, we have observed a weak influence of the Reynolds number on the values �� and ��0 at low-to-moderate ������. This experimental technique is proposed as a low cost alternative to characterize wingtip vortices based on flow visualizations. Secondly, we present a detailed analysis of experimental and numerical results for the flow of wingtip vortices behind a NACA0012 airfoil. Particular attention is paid to a specific value of the angle of attack, ��=9∘, and ultra-low and low chord-based Reynolds numbers ranging from ����=0.3×103 to 20×103.
    • URI
      https://hdl.handle.net/10630/15974
    • Compartir
      RefworksMendeley
    Mostrar el registro completo del ítem
    Ficheros
    TD_GARCIA_ORTIZ_Jose_Hermenegildo.pdf (4.423Mb)
    Colecciones
    • IMTF - Tesis

    Estadísticas

    Ver Estadísticas de uso
    Buscar en Dimension
    REPOSITORIO INSTITUCIONAL UNIVERSIDAD DE MÁLAGA
    REPOSITORIO INSTITUCIONAL UNIVERSIDAD DE MÁLAGA
     

     

    REPOSITORIO INSTITUCIONAL UNIVERSIDAD DE MÁLAGA
    REPOSITORIO INSTITUCIONAL UNIVERSIDAD DE MÁLAGA