使用脉冲波多普勒超声对涡流进行表征。

Characterization of vortices using pulsed-wave Doppler ultrasound.

作者信息

Gaupp S, Wang Y, How T V, Fish P J

机构信息

Department of Clinical Engineering, University of Liverpool, UK.

出版信息

Proc Inst Mech Eng H. 2000;214(6):677-84. doi: 10.1243/0954411001535705.

DOI:10.1243/0954411001535705

PMID:11201415

Abstract

The detection and characterization of vortices from a Kaman vortex generator by means of a 20 MHz pulsed-wave Doppler ultrasound system were assessed. Measurements were made at different steady flowrates in a 10 mm internal diameter polyurethane tube, 14 mm distal to a circular cylinder of diameter 2 mm, placed across the tube inlet. The results were compared with those obtained with a two-component laser Doppler anemometer system. There was generally good agreement between the two techniques in the measurement of convective flow velocity, frequency of vortex shedding and the circulation velocity of the vortices. It is concluded that pulsed-wave Doppler ultrasound is a suitable technique for investigating vortical flow structures.

摘要

通过20 MHz脉冲波多普勒超声系统对来自卡曼涡街发生器的涡旋进行检测和特性分析。在内径为10 mm的聚氨酯管中，在距直径2 mm的圆柱体14 mm远的位置（该圆柱体横跨管入口），于不同稳定流速下进行测量。将结果与用双分量激光多普勒风速仪系统获得的结果进行比较。在对流流速、涡旋脱落频率和涡旋的环流速度的测量方面，这两种技术总体上具有良好的一致性。得出的结论是，脉冲波多普勒超声是研究涡旋流动结构的合适技术。