超声频率和管型对超声空化效应的影响研究  

Influences of Ultrasonic Frequency and Tube Types on Ultrasonic Cavitation Effect

作　　者：张艾萍[1] 杨钊[1] 夏荣涛 丁权[1] 张媛媛[1] 

机构地区：[1]东北电力大学能源与动力工程学院

出　　处：《化工机械》2016年第4期517-521,539,共6页Chemical Engineering & Machinery

基　　金：国家自然科学基金项目(51476025);东北电力大学博士科研启动基金项目(BSJXM-201207)

摘　　要：利用FLUENT软件对不同换热管型在不同频率下的空化效应进行了数值模拟。通过比较换热管中的汽含率,反映空化效应的优劣,得出最佳的空化频率。结果表明：圆管、波纹管、波节管在超声频率为20k Hz时空化效果最佳,横纹管在超声频率20-25k Hz范围内的空化效果最佳。对于不同结构的换热管道,横纹管的几何结构更有利于空化的产生,其次是波纹管和圆管,波节管最不利于空化的产生，FLUENT software was adopted to simulate cavitation effect of various heat exchange tubes at different frequencies. Comparing the vapor volume fraction of heat exchange tubes and analyzing cavitation effects show that,the circular tube,and bellows tube and corrugated pipe have optimum cavitation effect when ultrasonic frequency stays at 20 k Hz,so does the transversally-corrugated tube at the ultrasonic frequency from20 k Hz to 25 k Hz. For the different heat exchange tubes,the geometric structure of the transversally-corrugated tube can benefit cavitation occurrence,then comes to the bellows tube and circular pipe in turn,the corrugated pipe goes against the generation of cavitation.

关 键 词：换热管 超声波频率 超声空化 数值模拟 

分 类 号：TQ051.5[化学工程]