Experimental Study on Cooling of Heading Face by Local Ventilation

Abstract

An about one-tenth scale model experimental apparatus was used to investigate the cooling effectiveness of local ventilation and the heat transfer at the heading face.
The following two major results were obtained through this experimental study. 1) For the purpose of effective cooling at the heading face, there is an optimal setting place for the local ventilation duct. 2) The following heat transfer relationship was obtained. Nu=C·Re^0.9·Pr^0.5 where, Nu: Nusselt Number defined by the authors. Re: Reynolds Number defined by the authors. Pr: Prandtl Number of air. C: Coefficient dependent on the position of the air duct and the support dimensions.