Ultrasonic Effect on Heat Transfer Performance of Oscillating Heat Pipes

被引：18
|
作者：
Zhao, Nannan [1 ]
Fu, Benwei [1 ]
Ma, Hongbin [2 ]
Su, Fengmin [1 ]
机构：
[1] Dalian Maritime Univ, Inst Marine Engn & Thermal Sci, Marine Engn Coll, Dalian 116026, Peoples R China
[2] Univ Missouri, Dept Mech & Aerosp Engn, Columbia, MO 65211 USA
来源：
JOURNAL OF HEAT TRANSFER-TRANSACTIONS OF THE ASME | 2015年 / 137卷 / 09期
关键词：
piezoelectricity; oscillating heat pipe; ultrasound; acetone; ACOUSTIC CAVITATION;
D O I：
10.1115/1.4030227
中图分类号：
O414.1 [热力学];
学科分类号：
摘要：
The ultrasonic effect on the heat transfer performance in oscillating heat pipes (OHPs) was investigated experimentally. Ultrasonic sound was applied to the evaporating section of the OHP by using electrically controlled piezoelectric ceramics. The heat pipes were tested with or without the ultrasonic effect. The effects of heat input, filling ratio, orientation, operating temperature, and working fluids (water and acetone) were investigated. The experimental results showed that ultrasonic sound can affect the oscillating motions and enhance the heat transfer performance of an OHP. However, the heat transfer enhancement mainly occurs at low heat input. In addition, it was found that heat transfer enhancement of the ultrasonic effect depends on the working fluid and operating temperature. At an operating temperature of 20 degrees C, the enhancement percentage of the water OHP is higher than acetone OHP. However, when the operating temperature was increased to 40 degrees C, the enhancement percentage of the water OHP was lower than the acetone OHP.
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页数：6
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