Evaluation of the rate of heat transfer to supercritical helium with regard for specific changes in thermophysical properties

In the course of determination of heat transfer intensity to supercritical helium in narrow channels under known regime parameters the main problem is the rational choice of rules for the averaging of thermal physics properties in the cross section of the current. It is shown that in the course of choosing the form of generalizing dependence on the basis of approximate Reynolds analogy a successful correlation is achieved using comultipliers-averaging coefficients. The suggested dependence gives a satisfactory description of all the known experimental data in vertical and horizontal narrow channels