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.

本文介绍并讨论了常闭型磁机械气流微阀的开发，该阀设计用于主动空气动力学流量控制应用。微型阀的结构由高度灵活的机械谐振器，使电磁谐振器致动的微型线圈和椭圆形包装组成。谐振器系统由弹性体膜和微型磁体组成。器件的制造过程基于微成型，微加工和快速成型。该微型阀提供的脉冲式微型喷射器可以在高达750 Hz的不同占空比和频率下使用。对于3 L / min的相应气流速率，微喷射速度达到100 m / s。在Ahmed人体模型上实施了二十个微型阀阵列，并成功进行了分离流控制实验。微型喷射器提供的驱动力使类似车辆形状的阻力降低了4.3％。