莫尔吸量管热水喷泉现象的研究

摘要

建立了薄壁大孔口流线型管嘴出流模型,并推导了莫尔吸量管中吸入部分热水后产生喷泉的最大喷射高度表达式.讨论了吸水体积、热水温度和吸量管直径对最大喷射高度的影响,并分析了影响最大喷射高度的因素.实验结果表明:热水温度愈高,吸量管直径愈大,喷泉高度愈大.在影响莫尔吸量管喷泉高度的因素中:流体流动状态对其影响最大,流体在管中与壁面发生碰撞对其的影响程度次之,其次是流体传热对喷射高度的影响,流体本身物性、空气阻力对喷射高度的影响最弱.%The thin-walled large orifice streamline nozzle outflow model was set up, and the formula of the maximum jet height of hot water fountain of Mohr pipettes was derived.The effect of the water volume, the temperature of the hot water and the diameter of the pipette on the maximum jet height was discussed.Influencing factors on the maximum jet height were analyzed by comparing with the experimental data.The experimental results showed that the higher the hot water temperature and the larger the diameter of the pipette, the greater the height of the fountain.In factors affecting the maximum jet height, the first was fluid flow state, the second was the collision of the fluid with pipette wall, the third was the heat transfer, the influence of the physical properties of the fluid and the air resistance was the weakest.