Observatorio de I+D+i UPM

Memorias de investigación
Book chapters:
Breakup criterion for droplets in the vicinity of a leading edge of an airfoil
Year:2017
Research Areas
  • Aeronautical engineering
Information
Abstract
A new breakup criterion is proposed in this article for droplets that suffers the flow field generated by an incoming airfoil. This criterion is based on the study of the characteristic times involved in the problem, which are the characteristic flow field variation time and the characteristic droplet deformation time. An empirical correlation is given to determine the Weber number at the onset of the breakup for each flow field and droplet size. Experimental data on the droplet deformation and breakup tests conducted in a rotating arm facility was used for the correlation. Droplets, in the range of 0.3 to 3.6 mm of diameter, were allowed to fall in the path of an incoming airfoil attached to the end of a rotating arm. Airfoil velocities varied between 50 m/s and 90 m/s while its leading edge radius ranged from 0.030 to 0.103 m. The phenomenon was recorded by a high speed camera using shadowgraph illumination technique. The empirical correlation was obtained from droplets that breakup in the bag and stamen breakup mode. However the same correlation seems to be valid for droplets in the regime of shear breakup and for droplets in the regime of bag breakup.
International
Si
10.2514/6.2017-4479
Book Edition
Book Publishing
American Institute of Aeronautics and Astronautics
ISBN
978-1-62410-496-1
Series
AIAA 2017-4479
Book title
9th AIAA Atmospheric and Space Environments Conference
From page
1
To page
15
Participants
  • Autor: Adelaida García-Magariño García (UPM)
  • Autor: Suthyvann Sor Mendi (UPM)
  • Autor: Angel Gerardo Velazquez Lopez (UPM)
Research Group, Departaments and Institutes related
  • Creador: Departamento: Mecánica de Fluidos y Propulsión Aeroespacial
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