A correlation for heat transfer to superphysical helium in turbulent flow in small channels

This paper presents a new correlation for the deterioration in heat transfer to turbulent flows of helium, relative to standard constant property correlations. The correlating parameters are arrived at by analogy between the heat transfer process to a gas with high thermal expansion and that which takes place in the presence of gas injection through a porous wall, the idea having been originally proposed by Kruzhilin. The idea appears to be applicable to the ideal gas state as well as the supercritical state. Comparison with available experimental data is made. Not only is the correlation of the data good, but the actual injection equation may be used to predict deterioration by as much as an order of magnitude. (author)