Abstract
For investigation of two phase flow characteristics, it is important to measure their void fraction, and bubble population and sizes. Although X-Ray, Gamma-Ray and electrical condutivity probe have been used to estimate these values, the former two methods may be so complicate and more expensive, the latter distubs flow condition.
In this paper, a simple measuring technique by using laser beam is treated with direct contact condensation processes of mixing streams at high velocity ratio, which is observed within such a condesing ejector and ECCS of reactor etc. It may be possible to visualize two dimensional pattern of bubble distribution along the flow direction by using this method, which is based on the detection of laser beam acrossa chanel. The relationship between the numbers of bubble and the intensity of laser beam and effectiveness of this technique are discussed.
