方案摘要
方案下载应用领域 | 其他 |
检测样本 | 其他 |
检测项目 | |
参考标准 | 暂无 |
In the last years, several techniques have been developed and improved in such a way that it is possible to measure the three velocity components in a flow. Some techniques as Stereoscopic PIV or holographic PIV are well known. Others, like tomographic PIV started to develop more recently. Stereoscopic Particle Image Velocimetry (SPIV) or Tomographic PIV need a complex set-up, involving flow visualization with several cameras, and present important restrictions when applied to confined liquid flows. Others like Holographic PIV cannot be applied in flows with a high particle density. Here a new technique, called High Speed Digital Image Plane Holography has been developed for the measurement of the three velocity components in a complex geometry brain aneurysm model using a configuration similar to regular PIV. This was done by using a two cavity high speed laser, one double frame high speed camera and normal visualization. The two in-plane velocity components were obtained from the holograms reconstructed intensity distribution using a PIV analysis. The out-of plane component was obtained from the reconstructed phase differences using an interferometric method. Due to the laser short coherence length, a portable and compact system has been built in order to be able to the measure larger fluid areas.
在一个双稳湍流涡旋火焰中,对间歇性动态的时间-频率定位
Particle-laden Taylor-Couette流:高阶转变和径向局部波浪涡旋的证据
7根杆束的流体-结构相互作用:用实验数据对比数值模拟
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