MEASUREMENTS AND PREDICTION OF WIND-INDUCED HEAT-TRANSFER THROUGH PERMEABLE COLD-WEATHER CLOTHING

This paper outlines experimental and theoretical work on heat transfer through cold-weather clothing systems consisting of a somewhat permea ble sheath over a layer of insulation batting. The experiments were ca rried out in a wind tunnel with the clothing systems installed on a 0. 165 m diameter heated circular cylinder. Measurements included pressur e distributions, temperatures and heat fluxes at several wind speeds. It was found possible to correlate the experimental results in terms o f a single parameter, giving a compact presentation suitable for desig n guidance. A simple theoretical model is outlined. Predicted maximum heat fluxes agree well with the experimental data although the shapes of the predicted and experimental heat flux distributions around the c ylinder differ substantially.