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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

NUMERICAL ANALYSIS OF HEAT TRANSFER IN HIGH TEMPERATURE HIGH HEAT FLUX HYDROGEN COOLED SYSTEMS

Get access (open in a dialog) DOI: 10.1615/IHTC10.2760
pages 193-198

Resumo

Under high temperature and high heat flux conditions of a nuclear rocket core, partial dissociation of hydrogen introduces an unprecedented challenge to engineering correlations which are used to predict wall heat transfer rates. This paper presents the results of a detailed computational analysis of flow and heat transfer in a high temperature, high heat flux circular tube cooled or heated by the turbulent flow of hydrogen gas. A large number of empirical correlations of the Nusselt number with correction terms for near wall, real gas properties and entrance regions are considered and evaluated. A comparative analysis is conducted to identify the Nusselt number correlation that best fits the physical conditions of a hydrogen cooled nuclear rocket engine.