Abonnement à la biblothèque: Guest

ISSN Online: 2377-424X

ISBN Print: 0-89116-559-2

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

THERMAL MIXING FLOW VISUALIZATION

Get access (open in a dialog) DOI: 10.1615/IHTC8.3370
pages 2505-2510

Résumé

In connection with evaluation of the potential for Pressurized Thermal Shock (PTS) in nuclear power reactors, flow visualization studies were conducted in a 1/5-scale transparent model of the reactor cold leg and downcomer. Tests were performed for the limiting condition of stagnant locp flow. The value of the high pressure injection (HPI) flow was chosen based on Froude number scaling of prototypical HPI flows. A dyed salt water solution was used to simulate the density difference between the warm loop water and the cold HPI flow and to facilitate observation of the mixing phenomena. In addition to the motion pictures illustrating the mixing phenomena and providing the basis for a mechanistic description of the flow in the HPI injection region, the results include transient velocity profiles in the cold leg and downcomer, HPI buoyant jet entrainment rates and flow split ratios, and transient density profiles in the cold leg. Findings from this study are compared with the results of previous PTS thermal mixing studies.