摘要
通过实验研究了流体在管内雷诺数达5.11×104时,超声波功率对抑垢、除垢的匹配关系及声空化强度对传热系数的影响。研究表明,超声波功率在200 W以下时具有抑垢效应;当功率超过200 W以上时具有除垢效果,并且除垢效果与波声功率成正比。超声波功率还对强化传热有明显影响。当超声波功率为300 W时,传热系数达765 W/(m2.K),达到最佳传热效果。本文还初步研究了超声波传播方向改变时对除垢效果的影响。
An experimental study is conducted of the matching relations between ultrasonic wave power on the one hand and incrustation inhibition and removal on the other as well as of the effect of sonic cavitation-intensity on heat transfer coefficient when the Reynolds number of fluid in a tube amounts to 5.11×10~4.The research results show that the ultrasonic waves attain an incrustation inhibition effect iveness when the ultrasonic wave power is below 200 W and become effective in removing incrustation when the ultrasonic wave power is over 200 W.The incrustation removal effect is in direct proportion to the magnitude of the ultrasonic wave power.Furthermore,the ultrasonic wave power has an obvious effect on heat transfer intensification.When the ultrasonic wave power is 300 W,the heat transfer coefficient will be 765 W/(m^2·K),achieving an optimum heat transfer effect.In addition,a preliminary study is performed of the possible impact on incrustation removal effect when a change in ultrasonic-wave propagation direction takes place.
出处
《热能动力工程》
CAS
CSCD
北大核心
2006年第4期355-357,共3页
Journal of Engineering for Thermal Energy and Power
关键词
超声波除垢
空化强度
传热
ultrasonic incrustation removal,cavitation intensity,heat transfer
