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18 April 2006 Experimental determination of local convection heat transfer coefficient field using two-dimensional and dynamic infrared thermography (2DD-IRT) method
J. A. Patorski; F. Groeschel
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Proceedings Volume 6205, Thermosense XXVIII; 62050T (2006) https://doi.org/10.1117/12.664572
Event: Defense and Security Symposium, 2006, Orlando (Kissimmee), Florida, United States
Abstract
In the scope of the Megawatt Pilot Experiment MEGAPIE, i.e. the development of a liquid metal target for a spallation neutron source, an experimental thermo-hydraulics investigation of the target proton beam entry window cooling has been performed. Goal of this investigation concerned the measurement of the local convection heat transfer coefficient (HTC) inside of the proton beam entry window area of the MEGAPIE target, in particular: determination of HTC absolute values, distribution/visualization of HTC field shape and dynamic behavior of HTC field i.e. visualization of HTC field fluctuations. Within KILOPIE's experimental set-up the following conditions of MEGAPIE target have been fulfilled: Using of liquid metal (LM) lead-bismuth eutectic (LBE); this simultaneously serves as target material and coolant. Using of T91-steel; for the shell-dish of hemispherical mock-up of the proton beam entry window. Using of original geometry of piping insertions for the simulation of internal LBE coolant flow geometry. In KILOPIE the improved Two-Dimensional and Dynamic of Infrared Thermography (2DD-IRT) Method, presented on Thermosense XXII in year 2000, has been used. In this paper the improvements of 2DD-IRT method and some result of KILOPIE experimental investigations performed at PSI in Switzerland will be presented. A specially tailored Aluchrom-steel shell is used, which allows applying a uniform and known constant heat flux deposition on the outer surface of the T91-steel hemispherical mock-up of the target window. The optical non-contact IRT equipment measures the outer surface temperature of the Aluchrom-steel heater glued to the T91-steel mock-up dish. The determination of the local convection HTC is a result of ratio of the known local heat flux from the Aluchrom-steel heater to the difference between the local inner surface temperature of the T91-steel mock-up dish and the bulk temperature of the LBE coolant.
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J. A. Patorski and F. Groeschel "Experimental determination of local convection heat transfer coefficient field using two-dimensional and dynamic infrared thermography (2DD-IRT) method", Proc. SPIE 6205, Thermosense XXVIII, 62050T (18 April 2006); https://doi.org/10.1117/12.664572
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