https://scholars.lib.ntu.edu.tw/handle/123456789/67814
標題: | A novel fluidic oscillator incorporating step-shaped attachment walls | 作者: | Yang, J. T. Chen, C. K. Tsai, K. J. Lin, W. Z. Sheen, H. J. YangJT |
關鍵字: | Flow structure; Fluidic oscillator; PIV; Spectra analysis | 公開日期: | 2007 | 卷: | 135 | 期: | 2 | 起(迄)頁: | 476-483 | 來源出版物: | Sensors and Actuators A: Physical | 摘要: | A novel fluidic oscillator incorporating step-shaped attachment walls and acute-angle splitters has been designed and verified experimentally to stabilize the oscillation of circulation flow, to modify the flow patterns and to improve the performance. Focusing on various oscillators of plane-wall and step-wall designs, we systematically analyzed the pressure spectra, pressure loss, and flow structure, via particle-imaging velocimetry, flow visualization, and pressure sensors. The results reveal that the novel design promotes conditions to initiate the oscillator and makes the recirculation vortices oscillate more effectively and stably. The operating range of this step-wall oscillator is broadened and the ratio of signal to noise of the step oscillator is 17 times as great as that with plane walls at a greater flow rate, 65 L/min. Comparison of the wave form of the spectral analysis and the ratio of signal to noise over the entire experimental range further corroborates the superior features of the novel design. © 2006 Elsevier B.V. All rights reserved. |
URI: | http://ntur.lib.ntu.edu.tw//handle/246246/86940 https://www.scopus.com/inward/record.uri?eid=2-s2.0-34047172724&doi=10.1016%2fj.sna.2006.09.016&partnerID=40&md5=1fa70a3598c145884f0ac82e429e7530 |
ISSN: | 09244247 | SDG/關鍵字: | Flow patterns; Flow structure; Optical beam splitters; Oscillators (electronic); Signal to noise ratio; Spectrum analysis; Fluidic oscillators; Particle imaging velocimetry; PIV; Recirculation vortices; Fluidic devices |
顯示於: | 機械工程學系 |
在 IR 系統中的文件,除了特別指名其著作權條款之外,均受到著作權保護,並且保留所有的權利。