摘要
采用光偏转测试系统研究了不同温度纯净水中激光空泡脉动过程,通过实验获得了激光空泡在靶表面膨胀和收缩全过程,确定了空泡的最大、最小泡半径、脉动周期和泡壁运动速度。实验采用0℃到70℃的纯净水,测量了空泡的泡半径和脉动周期等特征参量变化情况。实验结果表明,液体温度是影响空泡脉动的一个非常重要的因素,随着液体温度的增加空泡的最大泡半径和溃灭周期均呈增加趋势。给出了相应的理论解释。
Temperature effects on the behavior of laser-induced bubble in water near the surface of Cu target are investigated experimentally by means of a fiber-coupling optical beam deflection technique （OBD）.The maximum and minimum bubble radii as well as the period and velocity of contracting-expanding of the bubble are determined according to the characteristic signals.The tests of cavitation bubble are performed by using distill water at different temperatures from freezing point（0 ℃） to near boiling.The results indicate that the temperature strongly influences the bubble dynamics.The maximum bubble radius and bubble lifetime increase with the temperature.The mechanism is discussed.
出处
《光电子．激光》
EI
CAS
CSCD
北大核心
2010年第5期791-794,共4页
Journal of Optoelectronics·Laser
基金
国家自然科学基金资助项目(50975275)
中国博士后基金资助项目(20090461156)
关键词
空泡
液体温度
最大泡半径
最小泡半径
生命周期
cavitation bubble
liquid temperature
maximum bubble radius
minimum bubble radii
bubble lifetime
