一様加熱円管内の超臨界水素流れに関する数値解析(相変化,一般講演)

概要

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Understanding and predicting flowfield and heat transfer characteristics of supercritical coolant flow in cooling channels are prerequisite to improve design and performance of regeneratively cooled rocket thrust chambers. As a preliminary study, a CFD code which is able to compute supercritical flows with real gas model based on the cubic equation of state is developed in the current study. The developed code is validated against an experiment for a supercritical parahydrogen flow in a uniformely heated tube, and its peculiar flowfield and heat transfer chracteristics are investigated. The computed result shows a good agreement with the reference experimental data with regard to inner wall temperature profile, coolant pressure and temperature at inlet or outlet of the tube. Also, the peculiar behavior, called "heat transfer deterioration", is successfully predicted under transcritical condition with high heat flux and the mechanism of it is clarified.
2010-09-09