Lee Sang Joon, Kim Guk Bae, Yim Dae Hyun, Jung Sung Yong
Department of Mechanical Engineering, Center for Biofluid and Biomimic Research, Pohang University of Science and Technology, San 31, Hyojadong, Nam-gu, Pohang 790-784, Republic of Korea.
Rev Sci Instrum. 2009 Mar;80(3):033706. doi: 10.1063/1.3103644.
A compact x-ray particle image velocimetry (PIV) system employing a medical x-ray tube as a light source was developed to measure quantitative velocity field information of opaque flows. The x-ray PIV system consists of a medical x-ray tube, an x-ray charge coupled device camera, a programmable shutter for a pulse-type x ray, and a synchronization device. Through performance tests, the feasibility of the developed x-ray PIV system as a flow measuring device was verified. To check the feasibility of the developed system, we tested a tube flow at two different mean velocities of 1 and 2 mm/s. The x-ray absorption of tracer particles must be quite different from that of working fluid to have a good contrast in x-ray images. All experiments were performed under atmospheric pressure condition. This system is unique and useful for investigating various opaque flows or flows inside opaque conduits.
开发了一种紧凑型X射线粒子图像测速（PIV）系统，该系统采用医用X射线管作为光源，用于测量不透明流体的定量速度场信息。该X射线PIV系统由医用X射线管、X射线电荷耦合器件相机、用于脉冲式X射线的可编程快门以及同步装置组成。通过性能测试，验证了所开发的X射线PIV系统作为流量测量装置的可行性。为检验所开发系统的可行性，我们在1和2毫米/秒这两种不同的平均速度下对管道流动进行了测试。示踪粒子的X射线吸收必须与工作流体的X射线吸收有很大差异，以便在X射线图像中具有良好的对比度。所有实验均在大气压条件下进行。该系统对于研究各种不透明流体或不透明管道内的流动具有独特性且十分有用。
