DEVELOPMENT OF A BASIC MEASURING SYSTEM FOR LIQUID-GAS TWO PHASE FLOWS

利用相位多普勒测速技术（PDV）建立了气液两相流的基本测量系统。为了检查系统，建立了一个实验平台，以促进稳定/瞬态作业时的垂直流动。所设计的PDV系统可以根据测试通道内的压力水平和流速，详细地显示出不同气泡尺寸的分布，并通过光学可视化技术对其进行了验证。该系统为包括低温流体在内的气泡流动监测提供了一种有用的工具。

A basic measuring system for liquid-gas two phase flows has been established by utilizing Phase Doppler Velocimetry (PDV). In order to check the system, an experimental rig was set up to facilitate vertical flows at steady/transient operation.The present PDV system revealed the details of various bubble size distribution according to the pressure level and flow velocity within the test channel, which was checked by optical visualization technique as well.It can be concluded that the present system provides a useful tool for monitoring the bubble flows including cryogenic fluids.