EXPERIMENTAL STUDIES OF HYDRODYNAMICS AND HEAT TRANSFER IN CHANNELS WITH HIGH-POROUS CELLULAR MATERIALS IN SINGLE-PHASE FORCED CONVECTION AND FLOW BOILING OF WORKING FLUIDS

摘要

In this paper we consider experimental studies ofhydraulic resistance, surface heat transfer, internal heatexchange and critical heat fluxes for the flow of single-phaseand boiling working fluids in channels with high-porous inserts.Experiments were carried out with more than 40 samples ofhigh-porous cellular materials with the porosity 0.8-0.98 andmean pore diameter 0.62-4 mm and with more than 10 samplesof regular porous inserts and porosity #epsilon# valence 0.512-0.86 and mean pore diameter l.5-3.5 mm. These samples weremade of porcelain, invar, nichrome, bronze and copper.