Magnetically actuated microvalve for active flow control
Magnetically actuated microvalve for active flow control
复制标题
用于主动流量控制的磁驱动微型阀
DOI：
10.1088/1742-6596/34/1/104
复制
发表时间：
2006
期刊：
影响因子：
--
通讯作者：
Merlen Alain
中科院分区：
文献类型：
--
作者：
Ducloux Olivier;Talbi Abdelkrim;D. Yves;Gimeno Monge Leticia;Tiercelin Nicolas;P. Philippe;Preobrazhensky Vladimir;Merlen Alain
通过位于分离边缘附近的亚毫米孔，在边界层中吹入振荡气流，可以主动控制分离气流的再附着。为了实现脉冲射流，设计、制作了一种高流量、高驱动频率的微阀，并对其进行了表征。微阀由加压气源供气，其内部通道由PDMS聚合物膜交替挤压，调节朝向分离表面的气流。选择静磁驱动是因为它具有高应力、高位移和远程驱动能力。驱动装置包括电感驱动线圈和位于PDMS柔性膜上的NdFeB永磁体的耦合。共振频率和振动幅度的表征是通过干涉手段实现的。输出流的特征是使用纹状镜可视化和热线风速测量方法。本文介绍了微系统的设计和制作过程，以及这些表征的结果。
The reattachment of separated air flows can be actively controlled by blowing oscillatory air jets in the boundary layer, through submillimetric holes situated near the separation edge. To achieve such pulsed jets, a high flow rate, high actuation frequency microvalve was designed, fabricated and characterized. The microvalve is fed by a pressurized source of air, and its inner channel is alternatively pinched by a PDMS polymer membrane, modulating the air flow which is addressed towards the separated surface. Magnetostatic actuation was chosen for its high stress, high displacement, and remote actuation capabilities. The actuation consists in coupling an inductive driving coil and a NdFeB permanent magnet situated on the PDMS flexible membrane. Characterization of the resonance frequency, and vibration amplitude are achieved by interferometric means. The output flow is characterized using strioscopy visualization and hot wire anemometry methods. The design and fabrication process of the microsystem, and the results of these characterizations are presented in this paper.