超声空化对太阳集热器换热效果影响的数值分析  

NUMERICAL ANALYSIS OF EFFECT OF ULTRASONIC CAVITATION ON HEAT TRANSFER OF SOLAR COLLECTOR

作　　者：张艾萍[1] 夏荣涛 杨钊[1] 丁权[1] 王冲[1] 

机构地区：[1]东北电力大学能源与动力工程学院,吉林132012

出　　处：《太阳能学报》2017年第6期1646-1653,共8页Acta Energiae Solaris Sinica

基　　金：国家自然科学基金(51476025)

摘　　要：应用Fluent软件数值模拟超声空化对太阳集热器中不同管形(圆管和波纹管)换热效果的影响,并利用场协同理论对数值模拟的结果进行分析,分析结果表明:超声波频率和声压幅值对圆管和波纹管的换热效果均有影响,超声波频率越小、声压幅值越大,越有利于强化换热;超声波在管内传播时场协同数比无超声波大,且场协同数随声压幅值的增大而增大,此时温度场与速度场的协同程度较好;考虑强化换热与流体减阻之间的关系可知声压幅值越小,管内换热的综合性能效果较好。The numerical simulation for the effect of ultrasonic cavitation on heat transfer of different tubes （circular tubes and corrugated tubes） of the solar collectors was carried out by applying Fluent software. The field synergy theory was used to analyze the results of numerical simulation. The analysis results show that both ultrasonic frequency and sound pressure amplitude have effect on the heat transfer of circular tubes and corrugated tubes, and the smaller ultrasonic frequency and the greater sound pressure amplitude are more propitious to enhanced heat transfer. When ultrasound is transmitted within the tube, the field synergy number is larger than those without ultrasound, and the larger the sound pressure amplitude is, the greater the field synergy number is, so the temperature field and velocity field synergy degree is very well. Considering the relationship between enhanced heat transfer and fluid drag reduction, when the sound pressure amplitude is smaller, the comprehensive performance of heat transfer in tube is better.

关 键 词：太阳集热器 数值模拟 超声空化 场协同原理 场协同数 综合性能系数 

分 类 号：TK512[动力工程及工程热物理—热能工程]