CAJ | 학술논문

气泡的始动直径与运动过程对于揭示沸腾传热机理有着重要意义。利用高速摄像机对不同热流密度条件下，过冷沸腾液体中气泡在圆形朝下壁面上生长及运动的过程进行了实验研究。研究表明：在气泡的生长及运动过程中，气泡的形状从生长过程初期阶段的近似球体变化到滑移过程被拉长的椭圆体，直至最后消失；壁面热流密度对气泡的始动直径有一定影响，热流密度越大气泡的始动直径也就越大。
기포적시동직경여운동과정대우게시비등전열궤리유착중요의의。이용고속섭상궤대불동열류밀도조건하，과랭비등액체중기포재원형조하벽면상생장급운동적과정진행료실험연구。연구표명：재기포적생장급운동과정중，기포적형상종생장과정초기계단적근사구체변화도활이과정피랍장적타원체，직지최후소실；벽면열류밀도대기포적시동직경유일정영향，열류밀도월대기포적시동직경야취월대。
The equivalent diameter of a vapor bubble starting to move and its motion behavior are important for the research on mechanism of boiling heat transfer.The vapor bubble's growth and motion on a downward facing circular surface in subcooled boiling liquid under various heat fluxes are studied experimentally by using a high-speed camera.The experimental results show that in the process of its growth and movement,the vapor bubble changes from a sphere in the growth process at the initial stage to an elongated ellipsoid in its sliding process,and then it is broken.The heat flux has an influence on the equivalent diameter of vapor bubble starting to move,and the equivalent diameter of vapor bubble starting to move increases with the increasing of heat flux.