An Experimental Study on a Steam-Water Single Slug in an Adiabatic Vertical Pipe

Concerning the complicated peculiarity of flashing flow, the paucity of reports relating its flow peculiarity, except for bubble flow and annular flow, prompted us to investigate it. In this paper we describe an experimental study of the behavior analysis of a stream-water single slug in an adiabatic vertical pipe. We measured slug growth rates, liquid temperatures and steam temperatures in the slug, etc. We experimentally clarified the relationship between slug growth rates and the degree of super heat, steam temperature in the slug and saturation pressure. Furthermore, we have made measurements of velocity profiles of liquids at the nose of the slug by the use of LDV.