The Investigation of Thermal-Flow and Dynamic Characteristics of Ultrasonic Micro-Blower
碩士 === 中原大學 === 機械工程研究所 === 106 === The present study investigated both dynamics characteristics and cooling performance of the ultrasonic micro-blower device made by Murata Manufacturing Corporation. The correlations between input voltage, diaphragm deflection, and jet velocity under varying axial...
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| Format: | Others |
| Language: | zh-TW |
| Published: |
2018
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| Online Access: | http://ndltd.ncl.edu.tw/handle/xsu5ng |
| Summary: | 碩士 === 中原大學 === 機械工程研究所 === 106 === The present study investigated both dynamics characteristics and cooling performance of the ultrasonic micro-blower device made by Murata Manufacturing Corporation. The correlations between input voltage, diaphragm deflection, and jet velocity under varying axial and radial positions were analyzed. Temperature effect on the actuator diaphragm were examined in order to evaluate heat transfer performance of the micro-blower. The increasing rate of jet velocity with respect to input voltage was found to decrease obviously as increase the axial distance. The time dependent diaphragm deflection at different radial positions were measured using vibrometer under varying input voltages. The experimental results show that transient deflection of the diaphragm vibrated as a periodic sine wave. The diaphragm was found to decrease with input voltage at different radial positions. The increase of the blower temperature can obviously increase the diaphragm deflection and jet velocity. The maximum enhancement factor was obtained of approximately 11 times than that under natural convection. The Nusselt number strongly depends on the input voltages and axial distance of the blower. The optimal cooling performance was obtained at 20 mm between heater and blower.
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