Experimental determination of the local heat transfer coefficient in a closely packed pin arrangement

摘要

The determination of the heat transfer coefficient of the pins of the Spallation Neutron Source is a very important problern for the development of this facility, as data for thermal and structural studies. Forthis purpose, a test apparatus was built, in scale 1 : 1, for the simulation of the thermal and hydraulical conditions of the Neutron Source. This apparatus is a pin bank, with one of the pins electrically heated. Performance of measurements gave the values for the heat transfer coefficient, here presented in the Nusselt Nurober form, and its local distribution. Results show the linear dependence of Nusselt Nurober on Reynolds Number, for a constant heat production.