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高速烘缸内冷凝水形成的稳定水环层是热量传递的最主要阻力。分析烘缸内采用蒸汽汽刀式供给方式,对水环层进行剪切干扰,使原本稳定流动的水环层产生湍动的可行性;初步设计蒸汽汽刀式供给系统结构。为方便观察,用有机玻璃制成的筒体代替烘缸,用空气气刀模拟蒸汽汽刀进行了实验研究。实验结果表明,采用蒸汽汽刀式供给方式,使水环层产生湍动,降低水环层热量传递的阻力,增加传热效率,能够达到节能效果。
The formation of a stable water layer in the high-speed drying cylinder condensate is the most important resistance to heat transfer. Analysis of the steam inside the dryer steam blade type of supply, the water ring shear interference, so that the steady flow of the water ring turbulence is feasible; preliminary design steam steam knife supply system structure. For the convenience of observation, a cylinder made of plexiglass was used instead of a drying cylinder, and an experimental study was carried out by using an air knife to simulate a steam steam knife. The experimental results show that the use of steam steam knife-type supply, the water ring turbulence generated to reduce the water ring layer of heat transfer resistance, increase heat transfer efficiency, energy saving can be achieved.