1998 Volume 12 Issue 1 Pages 14-27
The progress of the two-phase flow reseach has been divided into four stages. These period are 1948-1959, 1960-1970, 1971-1979, and 1980-1990. In this 9th Report, the development of researches on the flow instabilities in boiling channels in the latter half of the second period (1965-1970) has been described. The progress of experimental researches, which were conducted in universities in USA and Japan, on density wave oscillation, pressure drop oscillation, system-induced oscillation, thermal oscillation, flow distribution in parallel channels, and flow excursion, has been described with the historical aspect.