RT Journal Article ID 318b98f863f95f21 A1 Kalyakin, S. G. A1 Klimanova, YU. V. A1 Remizov, O. V. A1 Serdun, N. P. T1 Structure of a Vapor-Water Flow and Characteristic Features of Its Separation in Large-Diameter Channels JF Heat Transfer Research JO HTR YR 2004 FD 2004-06-08 VO 35 IS 1&2 OP 7 AB The results pertaining to separation of a vapor-water flow and to its structure in large-diameter vertical channels are given. The tests were carried out at a pressure of 3.5 MPa and a vapor-water mixture flow rate of 10.0, 12.0, and 20.0 kg/sec, which corresponded to mass velocities in the test section of 750, 1000, and 1500 kg/m2·sec, respectively. Relative enthalpy changed from −0.05 to +0.2. The experiments have shown that the separation coefficient in a separating chamber is substantially higher than in similar channels of small diameter. This is caused by the fact that even at relative enthalpies equal to 0, an annular-dispersed vapor-water flow is formed in the inner pipe, whereas at higher values there is a ring structure with an actual void fraction equal to 0.9−0.95 in the major part of the section. PB Begell House LK https://www.dl.begellhouse.com/journals/46784ef93dddff27,5d5eb5aa67e7721c,318b98f863f95f21.html