ISSN Online: 2377-424X
ISBN Print: 0-89116-559-2
International Heat Transfer Conference 8
BOILING HEAT TRANSFER IN THE ANNULAR FLOW REGIME
Abstract
Heat transfer data are presented for water in annular flow boiling at 160 and 390 kPa in a 9.6 ram bore tube. The difficulties of accurate measurement are described. Nucleate boiling occurs at wall superheats above a threshold dependent on local surface and flow conditions. At low superheats the data is consistent with single-phase convection through a turbulent liquid film, with partial suppression of turbulence at low vapour velocities. A thermal entrance effect has been identified in this regime.