Abo Bibliothek: Guest

ISSN Online: 2377-424X

ISBN Print: 0-89116-559-2

International Heat Transfer Conference 8
August, 17-22, 1986, San Francisco, USA

PRESSURE AND FLUID TO FLUID SCALING LAWS FOR TWO-PHASE FLOW LOOP

Get access (open in a dialog) DOI: 10.1615/IHTC8.4580
pages 2259-2264

Abstrakt

Scaling criteria for a natural circulation loop under single-phase and two-phase flow conditions are derived. Based on these criteria, practical applications for designing a scaled-down model are considered. Particular emphasis is given on scaling at reduced pressure levels relative to a prototype system and fluid to fluid scaling. It is a challenging problem to design a scaled-down model with different fluid properties due to a large number of similarity groups to be matched between a model and a prototype. The present study demonstrates a new approach to this classical problem using the two-phase flow scaling parameters. It indicates that a real time scaling is not a practical solution and a scaled-down model should have an accelerated (shortened) time scale. One of the most important results is the new scaling methodology for simulating pressure transients. It is obtained by considering the changes of the fluid property groups which appear within the two-phase similarity parameters and the single-phase to two-phase flow transition parameters.