Host: The Japan Society of Mechanical Engineers
Name : [in Japanese]
Date : September 13, 2020 - September 16, 2020
Wall heat flux sensors for the quantitative analysis of the cooling loss in the piston chamber of internal combustion engines have been developed to improve the efficiency of motor vehicles. For the simultaneous detection of the high-speed fluctuation (AC heat flux) and the steady component (DC heat flux), the wall heat flux sensor using thin film RTD and two internal thermocouples (TCs) on the Al alloy substrate is proposed. The proposed analysis method using the sensor can realize the calculation of wall heat flux independent of the attached environment by 2D transient heat transfer analysis with temperature measured at 3 points in the sensor. In this paper, the measurement of the wall heat flux generated by the hot air jet was performed, and the temperature was measured by the surface RTD, internal 2 TCs, and TC in the sensor mounting tube. The experimental investigation of the proposed analysis method using the fabricated sensor was conducted by comparing the result using the 4-point temperature (RTD, 2 internal TCs, and TC in mounting tube) and the 3-point temperature in the sensor substrate. (RTD, 2 internal TCs)
