This paper deals with the fluidic actuators in the pulsed mode used in turbulent boundary layer control, in particular as vortex generator (VG) in order to delay separation. Recently the study by Kostas et al (2007) has shown the importance of the transient phase of the VG actuators. In particular, an enhancement of the vortex-generation mechanism has been observed during the transient period, that is responsible for an increase of turbulence stress levels up to 200% relatively to the non actuated case. A large dependency of the exit velocity on the physical characteristic of the feed tube has been detected. This dependency suggests that a precise quantification of the pulsed jet dynamic during the transient period is necessary. In this work the transient behavior of the fluidic actuators used by Kostas et al (2007) is analyzed and experimented. A model is developed to explain the dynamics of the flow inside the actuator. On the whole, experiments show that the role of all physical parameters is consistent with the foreseen properties. The results obtained help to separate the input dynamic of the controller from the controlled flow. Another perspective of this work is to provide a guide for the design of fluidic actuators.
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ASME 2008 Fluids Engineering Division Summer Meeting collocated with the Heat Transfer, Energy Sustainability, and 3rd Energy Nanotechnology Conferences
August 10–14, 2008
Jacksonville, Florida, USA
Conference Sponsors:
- Fluids Engineering Division
ISBN:
978-0-7918-4840-1
PROCEEDINGS PAPER
Analysis and Modelling of a Fluidic Actuator
Caroline Braud,
Caroline Braud
Laboratoire de Me´canique de Lille, Villeneuve d’Ascq, France
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Arthur Dyment,
Arthur Dyment
Laboratoire de Me´canique de Lille, Villeneuve d’Ascq, France
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Jim Kostas,
Jim Kostas
Monash University, Clayton, VIC, Australia
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Jean Marc Foucaut,
Jean Marc Foucaut
Laboratoire de Me´canique de Lille, Villeneuve d’Ascq, France
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Michel Stanislas
Michel Stanislas
Laboratoire de Me´canique de Lille, Villeneuve d’Ascq, France
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Caroline Braud
Laboratoire de Me´canique de Lille, Villeneuve d’Ascq, France
Arthur Dyment
Laboratoire de Me´canique de Lille, Villeneuve d’Ascq, France
Jim Kostas
Monash University, Clayton, VIC, Australia
Jean Marc Foucaut
Laboratoire de Me´canique de Lille, Villeneuve d’Ascq, France
Michel Stanislas
Laboratoire de Me´canique de Lille, Villeneuve d’Ascq, France
Paper No:
FEDSM2008-55027, pp. 473-480; 8 pages
Published Online:
June 30, 2009
Citation
Braud, C, Dyment, A, Kostas, J, Foucaut, JM, & Stanislas, M. "Analysis and Modelling of a Fluidic Actuator." Proceedings of the ASME 2008 Fluids Engineering Division Summer Meeting collocated with the Heat Transfer, Energy Sustainability, and 3rd Energy Nanotechnology Conferences. Volume 1: Symposia, Parts A and B. Jacksonville, Florida, USA. August 10–14, 2008. pp. 473-480. ASME. https://doi.org/10.1115/FEDSM2008-55027
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