Local Convective Heat Transfer from a Horizontal Tube in an Acoustic Cavitation Field  

作　　者：Dingwei Zhou Xuegong Hu Dengying Liu 

机构地区：[1]Chinese Acad Sci, Inst Engn Thermophys, Beijing 100080, Peoples R China

出　　处：《Journal of Thermal Science》2004年第4期338-343,共6页热科学学报（英文版）

摘　　要：An experiment has been carried out to investigate the local convective heat transfer from a horizontal circular copper tube in an acoustic cavitation field. The effects of acoustical parameters (including sound source intensity, the vibrator location and sound distance), fluid temperature and thermophysical properties of working fluid on heat transfer enhancement were studied, as well as the variation of heat transfer rate with sound source intensity at constant heat flux. Results show that convection heat transfer was remarkably enhanced due to disturbance and impingement by cavitation bubble. Among these cases tested, the maximum augmentation ratio of 3.95 was reached for acetone with a cluster of cavitation bubbles impinging perpendicularly on the tube surface.An experiment has been carried out to investigate the local convective heat transfer from a horizontal circular copper tube in an acoustic cavitation field. The effects of acoustical parameters (including sound source intensity, the vibrator location and sound distance), fluid temperature and thermophysical properties of working fluid on heat transfer enhancement were studied, as well as the variation of heat transfer rate with sound source intensity at constant heat flux. Results show that convection heat transfer was remarkably enhanced due to disturbance and impingement by cavitation bubble. Among these cases tested, the maximum augmentation ratio of 3.95 was reached for acetone with a cluster of cavitation bubbles impinging perpendicularly on the tube surface. Keywords acoustic cavitation - heat transfer - enhancement - convection - cavitation bubble CLC number TK124

关 键 词：ACOUSTIC CAVITATION heat TRANSFER enhancement CONVECTION CAVITATION bubble. 

分 类 号：TK124[动力工程及工程热物理—工程热物理]