Critical flashing flows in nozzles with subcooled inlet conditions

Journal Article · Sun May 01 04:00:00 EDT 1983 · J. Heat Transfer; (United States)

DOI:https://doi.org/10.1115/1.3245589· OSTI ID:5958664

Abuaf, N; Jones, Jr, O C; Wu, B J.C.

Examination of a large number of experiments dealing with flashing flows in converging and converging-diverging nozzles reveals that knowledge of the flashing inception point is the key to the prediction of critical flow rates. An extension of the static flashing inception correlation of Jones (16) and Alamgir and Lienhard (17) to flowing systems has allowed the determination of the location of flashing inception in nozzle flows with subcooled inlet conditions. It is shown that in all the experiments examined with subcooled inlet regardless of the degree of inlet subcooling, flashing inception invariably occurred very close to the throat. A correlation is given to predict flashing inception in both pipes and nozzles which matches all data available, but is lacking verification in intermediate nozzle geometries where turbulence may be important. A consequence of this behavior is that the critical mass flux may be correlated to the pressure difference between the nozzle inlet and flashing inception, through a single phase liquid discharge coefficient and an accurate prediction of the flashing inception pressure at the throat. Comparison with the available experiments indicate that the predicted mass fluxes are within 5 percent of the measurements.

• Research Organization: General Electric Co., Schenectady, New York, 12301
• OSTI ID: 5958664
• Journal Information: J. Heat Transfer; (United States), Journal Name: J. Heat Transfer; (United States) Vol. 105:2; ISSN JHTRA
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
420400* -- Engineering-- Heat Transfer & Fluid Flow
CALCULATION METHODS
COOLING
CRITICAL FLOW
DATA
EVAPORATION
FLASHING
FLUID FLOW
FLUIDS
INFORMATION
MASS TRANSFER
NOZZLES
NUMERICAL DATA
PHASE TRANSFORMATIONS
REYNOLDS NUMBER
SUBCOOLING
THEORETICAL DATA