In this paper, an experimental loop of gas-liquid two-phase flow, which could generate various of flow patterns, has been designed and constructed. The test section of the loop is made of transparent tube. The appearance of all gas-liquid two-phase flow patterns, observed in the experiments, could be recorded onto tapes with a CCD camera and a video recorder. THe investigations and analysis of the image information recorded on tapes are implemented with image processing method. The characteristics, relatie to the flowing the mixing states of gas-liquid, have been derived. The basic flow have been also revealed. The conditions of generating and transmitting of all flow patterns are discussed thoroughly.
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