Heat Transfer on Cylinder Covered with Close-fitting Fabrics : Part III, Distribution of Local Heat Transfer Coefficients

Abstract

The preceding two paper proposed a theoretical formulation of wind penetration and heat transmission through a fabric layer fitting closely to a heated cylinder which is a simple model of clothing system. This paper describes the heat transfer experiments of cylinders covered with 'knicker hose', 'camel underwear', 'body tights' and 'nylon stocking' respectively. The data agree well with the theoretical predictions. Phenomenological features are explained; three regimes of penetration, i.e. front 'flow in' region, middle 'flow out' region, and rear 'stagnate' region. Heat transfer is augmented in the front region, and its behaviour depends primarily on the fabric thickness and the state of contact with the cylinder.