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In order to design cooling systems, it is necessary to directly measure the cooling performance such as temperature and heat flux. However it has limitation of the sensor installation due to the narrow measurement space and also high operating temperature. In this limitation, the temperature has measured inlet and outlet. The surface temperature has measured indirectly and heat flux is predicted. This indirect method is needed accuracy of the sensor position and additional work such as development of a post processing calculation code in accordance with the shape are required. In this paper, we propose a method of directly measurement of the surface temperature and the heat flux. The temperature sensor fabricated close to the surface in order to improve the accuracy of the sensor for measuring the surface temperature and the heat flux. The fabricated thermocouple temperature sensor has applied on the surface temperature measurement experiment in the impinging jet cooling. To prevent sensor and the substrate were damaged due to thermal stress, a method with the ductility metal block substrate which embedded the sensor close to the surface has been proposed. The measured temperature was converted into the heat flux by the 1-D transient method. The metal block embedded with the sensors measured the distribution of the surface heat flux for water impinging jet at an initial temperature of 600 °C and the maximum heat flux was 4 MW/m. This measurement technique can be applied to the performance evaluation of steel manufacturing process and heat exchangers.

Embedded Temperature Sensor Array to Measure Distributed Heat Flux for Water Jet Cooling