層流流れにおける振動板を用いた熱伝達促進に関する研究

抄録

The problem of heat transfer has both practical and technical interest due to the increasing of heat flux density in microelectronic device. It is important to increase the cooling efficiency and suppress the pressure drop. The objective of the present paper is to propose the actuator control for the suppression of the pressure drop and the enhancement of the heat transfer in laminar regime. As a first step of the present study, the mini-channel with the height of 2.2 mm was fabricated, a vibration plate were developed using a piezo-electric element as a diving source. The temperature of the heated wall under a thermal condition of constant heat flux was measured by high-speed infrared thermograph. The heat transfer was enhanced by the periodic disturbance induced by using the vibration plate. Also the heat transfer enhancement depended on the vibrate frequency, and this frequency of the experiment results almost corresponded to that calculated from the instability analysis.