CAJ | 학술논문

双流体雾化降温冷却技术是将气体和液体在喷嘴内部直接混合,在高压射流作用下直接雾化,雾化的小液滴气化时带走热量,从而降低工作区域温度.喷雾冷却降温系统广泛应用于养殖、高精度建筑及机械切削加工中刀具的冷却等.影响喷雾降温冷却的关键因素是雾滴粒径和雾滴运动速度.雾滴粒径越小,其总表面积越大,易于蒸发、气化,从而产生良好的降温效果；而雾滴运动速度加快则可以进一步加快工作区域的换热过程.文章利用相位多普勒粒子动态分析仪(PDA)对4种不同喷孔直径的喷嘴进行了较为详细的实验研究,获得了影响雾滴粒径和雾滴运动速度的重要因素,得到了双流体雾化喷嘴工作的最佳压力与孔径组合,为喷雾冷却降温的研究奠定了基础.
쌍류체무화강온냉각기술시장기체화액체재분취내부직접혼합,재고압사류작용하직접무화,무화적소액적기화시대주열량,종이강저공작구역온도.분무냉각강온계통엄범응용우양식、고정도건축급궤계절삭가공중도구적냉각등.영향분무강온냉각적관건인소시무적립경화무적운동속도.무적립경월소,기총표면적월대,역우증발、기화,종이산생량호적강온효과；이무적운동속도가쾌칙가이진일보가쾌공작구역적환열과정.문장이용상위다보륵입자동태분석의(PDA)대4충불동분공직경적분취진행료교위상세적실험연구,획득료영향무적립경화무적운동속도적중요인소,득도료쌍류체무화분취공작적최가압력여공경조합,위분무냉각강온적연구전정료기출.
In the twin-fluid spray cooling, the liquid and gas are directly mixed in nozzle. The liquid is atomized directly under the action of high pressure jet flow. With the evaporating of droplets, the heat is taken away and the temperature drops in the working area. The spray cooling system is widely applied in the breed aquatics, high precision architecture and cutting. The key factor affecting the spray cooling is the droplets size and droplets velocity. The smaller the droplet is, the bigger the total surface area is, which is good for evaporation, thus resulting in a good cooling effect. The increasing of droplets velocity improves the heat exchange process in the working area. The experimental research on 4 kinds of different diameter nozzles by means of particle dynamics analyzer (PDA) was presented. The optimum working conditions of this spray nozzle was obtained.