Study on advanced measurement of multi-dimensional thermal hydraulics by a fast X-ray CT scanner

A fast X-ray CT system for measurement of mixed phase flow was developed which consists of highly sensitive semiconductor detectors and a multi-pulse X-ray generator composed of electron beam source and high voltage anode ring. A scanning time of milli-second order was realized, which enables to show high performance in time resolution. After precision evaluation by acrylic plastic models, application of the CT system was performed to gas-liquid two-phase flow. It was confirmed that three-dimensional flow visualization can be made for unsteady transient and multi-dimensional phase surface distributions. Parameters of measurement can be set freely and properly according to a object. (H. Yokoo)