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Magneto-mechanical micro-valve for active flow control

Abstract : This paper presents and discusses the development of a normally-off magneto-mechanical airflow microvalve designed for active aerodynamic flow control application. The architecture of the microvalve is composed of a highly flexible mechanical resonator, a miniature coil enabling the magnetic resonator actuation and a packaging with oval shape. The resonator system consists in an elastomer membrane and miniature magnets. The device fabrication process is based on micro-molding, micromachining and rapid prototyping. The pulsed micro-jet delivered by this microvalve can be used at different duty cycles and frequencies going up to 750 Hz. The micro-jet velocity reached 100 m/s for a corresponding airflow rate of 3 L/min. An array of twenty microvalves was implemented on an Ahmed body model and separation flow control experiments were successfully performed. The actuation provided by the micro-jets decreased by 4.3 % the drag on the vehicle-like shape.
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https://hal.archives-ouvertes.fr/hal-03103973
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Submitted on : Friday, January 8, 2021 - 3:14:44 PM
Last modification on : Tuesday, October 12, 2021 - 5:20:53 PM

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Romain Viard, Abdelkrim Talbi, Cécile Ghouila-Houri, Azeddine Kourta, Alain Merlen, et al.. Magneto-mechanical micro-valve for active flow control. Sensors and Actuators A: Physical , Elsevier, 2020, 316, pp.112387. ⟨10.1016/j.sna.2020.112387⟩. ⟨hal-03103973⟩

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