图书馆订购 Guest

ISSN Online: 2688-7231

ISBN Online: 978-1-56700-478-6

Proceedings of the 24th National and 2nd International ISHMT-ASTFE Heat and Mass Transfer Conference (IHMTC-2017)
December, 27-30, 2017, BITS Pilani, Hyderabad, India

INVESTIGATIONS ON FLOW INSTABILITIES IN SINGLE-CHANNEL NATURAL CIRCULATION SYSTEMS

Get access (open in a dialog) DOI: 10.1615/IHMTC-2017.890
pages 635-642

摘要

Natural circulation systems are prone to several types of flow instabilities under some of the operating conditions. A reliable prediction of stable and unstable operating regimes is of paramount importance for successful deployment of these systems. In the present stud, a system analysis model, based on HEM approach has been developed and a semi-implicit scheme with adaptive time step has been used to solve the governing equations. The proposed numerical scheme predicts the system stability behaviour adequately for a wide range of nodalizations, a key requirement for analysis of natural circulation based systems. Paper describes the mathematical model and its application to single-channel natural circulation systems. The mechanism for type-I and Type-II density wave oscillation has been discussed.