An Improved Heat Transfer Correlation for Supercritical Aviation Kerosene Flowing Upward and Downward in Vertical Tubes

Correlations are crucial to the design of cooling channels employed in regenerative cooling systems for scramjets. In this paper, correlations for the aviation kerosene flowing upward and downward in vertical tubes are studied and discussed. Four existing correlations are assessed against the available experimental data. To further improve the prediction accuracy of the heat transfer behaviors of the supercritical aviation kerosene, a new dimensionless parameter (Qi) relevant to the heat flux is proposed and introduced into the construction of a new correlation. Verification shows that the new correlation is more accurate than existing correlations.