MODELLING OF HEAT TRANSFER AND HYDRAULIC RESISTANCE OF TURBULENT GAS AND LIQUID FLOW IN TUBES WITH CIRCULAR TURBULIZERS

Abstract

The theoretical model for calculation of heat transfer is developed at turbulent flow in channels in conditions of heat transfer enhancement distinguished from known models by higher accuracy, absence of additional assumptions, account of the greater number of parameters rendering influence to processes of heat transfer. The computation data on isothermal heat transfer largely appropriate to experimental data are obtained. For the first time theoretical model for calculation of nonisothermal heat transfer and hydraulic resistance is developed at turbulent flow in tubes in conditions of heat transfer enhancement for various kinds of heat-carriers (gas, dropping liquid) with variable thermophysical properties changed by a monotone image. The computation data for a broad band of turbulizers parameters and regime parameters are obtained. For the first time theoretical model for calculation of nonisothermal heat transfer and hydraulic resistance is developed at turbulent flow of jet fuel of supercritical pressure (JFSCP) in tubes in condition of heat transfer enhancement on the base of four-layer scheme of turbulent flow.