摘要
基于超声雾化理论和超声聚焦理论,提出了一种应用于精密磨削加工中的球面聚焦超声汽雾冷却系统,在使用超声雾化作为冷却方式的同时,利用聚焦超声将汽雾汇聚到指定的换热位置,以提高汽雾的利用率。利用Fluent软件数值模拟和平面热源条件下稳态换热试验分析了聚焦汽雾和聚焦超声对聚焦超声汽雾冷却系统换热特性的影响。结果表明,当试件位于汽雾焦区时,聚焦汽雾的换热性能最佳,试件表面温度最低;同时,聚焦超声有助于强化中心区汽雾换热,进一步提高聚焦超声汽雾冷却系统的换热能力。
Based on the theory of ultrasonic atomization and focused ultrasound,a spherical focusedultrasound assisted ultrasonic atomizing cooling system was proposed to use for precision grinding. Theultrasonic atomization was used as a cooling method,at the same time,the mists were converged to thespecified heat positions by focused ultrasound to increase the utilization rates of mists. With the use of Fluentnumerical simulation and steady state heat transfer experiments under the conditions of plane heat sources,the effects of focused mists and focused ultrasound on the heat transfer performances of the focused ultrasoundassisted ultrasonic atomizing cooling system were analyzed. The results show that when the specimens arelocated in the focal area of the focused mists,the heat transfer performances of the focused mists are the best,the surface temperature of specimens is the lowest. Moreover,focused ultrasound may help to strengthen theheat transfers in the central areas,and further improve the heat transfer performances of the focused ultrasoundassisted ultrasonic atomizing cooling systems.
作者
曹洋
李华
任坤
刘素娟
王中旺
CAO Yang;LI Hua;REN Kun;LIU Sujuan;WANG Zhongwang(College of Mechanical Engineering, Suzhou University of Science and Technology, Suzhou, Jiangsu, 215000;College of Mechanical and Electronic Engineering, Henan University of Technology, Zhengzhou, 450000)
出处
《中国机械工程》
EI
CAS
CSCD
北大核心
2018年第11期1279-1284,共6页
China Mechanical Engineering
基金
国家自然科学基金资助项目(51075288)
江苏省高校自然科学研究面上项目(16KJD460007)
关键词
超声雾化
聚焦汽雾
聚焦超声
汽雾冷却
ultrasonic atomization
focused mist
focused ultrasound
mist cooling
