CAJ | 학술논문

本工作对由直径为8 mm的表面氧化后的碳钢球组成的填充床中的流动沸腾传热进行实验研究。通过逐步增加和减小热流密度的方式来控制沸腾起始与沸腾强度，监测到发生在填充床中的沸腾迟滞现象，研究了填充床中各种沸腾迟滞现象随着填充床内不同轴向和径向位置、表观流速等因素的变化规律。实验表明：高流速、远离出口、靠近管壁的情况不易出现成核滞后；增大表观流速、填充物表面粗糙度可增大沸腾湮灭滞后程度。
본공작대유직경위8 mm적표면양화후적탄강구조성적전충상중적류동비등전열진행실험연구。통과축보증가화감소열류밀도적방식래공제비등기시여비등강도，감측도발생재전충상중적비등지체현상，연구료전충상중각충비등지체현상수착전충상내불동축향화경향위치、표관류속등인소적변화규률。실험표명：고류속、원리출구、고근관벽적정황불역출현성핵체후；증대표관류속、전충물표면조조도가증대비등인멸체후정도。
The boiling heat transfer on packed bed with 8 mm carbon steel balls was investigated . The boiling curves were obtained at the increasing and decreasing conditions of heat flux , which made it possible to detect the boiling hysteresis phenomena .The various factors which impact on the boiling hysteresis in the channels , such as the axial and radial positions in the test section ,the superficial flow velocity etc .,were investigated .The experimental results show that the nucleation hysteresis is weak at high liquid velocity ,far from the outlet and near wall situations .When liquid superficial velocity and surface roughness of the fillers increase , the degree of annihilation hysteresis of boiling increases .