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ISSN Online: 2377-424X

ISBN Print: 0-85295-345-3

International Heat Transfer Conference 10
August, 14-18, 1994, Brighton, UK

UNSTEADY HEAT TRANSFER PROCESSES AT PRESSURIZATION AND DRAINING OF CLOSED VESSELS

Get access (open in a dialog) DOI: 10.1615/IHTC10.70
pages 233-238

Abstract

Original experimental results are presented on unsteady heat transfer in filling, pressurization and draining closed vessels. In this case unsteady heat transfer processes occur between the hot gas and vessels, as wall as between the hot gas and liquid mirror and determine the amount of hot gas which is necessary to displace liquid from a vessel.
The intensity of these processes is specified by a rate of variation of the wall temperature and liquid mirror temperature, i.e. this problem must be solved in the conjugated formulation. Use of heat transfer coefficient independent on unsteady boundary conditions (dependent only on rate of wall or liquid mirror temperature variation) enables one to find a time variation of wall temperature and a mean gas temperature at prescribed geometrical sizes of a vessel, hot gas mass flow rate and gas inlet temperature. And, finally, the amount of hot gas necessary to display liquid from a tank can be calculated.
hi the present paper there are the description and the comparison different schemes of fuel tank pressurization systems, the analysis of the physical models of heat transfer processes in fuel tanks with different schemes of gas injection, the recommendations for calculation of heat transfer processes in the tanks in their pressurization and draining.