UC知道化工机械在线翻译（1）
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Effect of tube curvature ratio on the residence time distribution of multiple particles in helical tubes
Abstract
The flow of solid–liquid mixtures, containing a heterogeneous mixture of particles, in helical tubes was investigated. The effects of curvature ratio of the helical tube (ratio of tube diameter to coil diameter), flow rate, carrier fluid viscosity, and particle concentration on the residence time (RT) and residence time distribution (RTD) were determined. All of the parameters, except the carrier fluid viscosity, had strong effects on the flow behavior of particles. The RT of acrylic particles decreased slightly upon mixing with the lower-density polystyrene particles. An increase in the flow rate and/or the curvature ratio resulted in a narrower RTD for both particle types.
r 2003 Swiss Society of Food Science and Technology. Published by Elsevier Science Ltd. All rights reserved.
Keywords: Residence time distribution; Solid–liquid flow; Hel
Abstract
The flow of solid–liquid mixtures, containing a heterogeneous mixture of particles, in helical tubes was investigated. The effects of curvature ratio of the helical tube (ratio of tube diameter to coil diameter), flow rate, carrier fluid viscosity, and particle concentration on the residence time (RT) and residence time distribution (RTD) were determined. All of the parameters, except the carrier fluid viscosity, had strong effects on the flow behavior of particles. The RT of acrylic particles decreased slightly upon mixing with the lower-density polystyrene particles. An increase in the flow rate and/or the curvature ratio resulted in a narrower RTD for both particle types.
r 2003 Swiss Society of Food Science and Technology. Published by Elsevier Science Ltd. All rights reserved.
Keywords: Residence time distribution; Solid–liquid flow; Hel
效应管曲率比对停留时间分布的多粒子的螺旋钢管
摘要
流动的固液混合物，含有异构混合物的颗粒，螺旋钢管被查处。影响曲率比例的螺旋管（比管径，以线圈的直径） ，流速，输送流体粘度以及粒子浓度对居住时（ RT ）和停留时间分布（热电阻）进行了测定。所有的参数中，除承运人流体粘度，有强烈的影响，对颗粒的运动行为。该逆转录丙烯酸颗粒轻微下跌后，混以较低的密度聚苯乙烯颗粒。增加流速和/或曲率比率产生了一个狭义的技术发展，为两粒子类型。
r 2003年瑞士社会的食品科学和技术。出版了由Elsevier科学有限公司保留所有权利。
关键词：停留时间分布;固液流;螺旋控股管;无菌加工;微粒食品
1 。导言
停留时间分布（热电阻）的粒子在
连续加工的固液混合物已
非常感兴趣的研究，因为它涉及到
无菌加工的颗粒食物。连续
热加工的，这些食物一直被视为
作为一个潜在的替代方案，在容器灭菌。
一些优势的无菌加工，因为总结
由拉马斯瓦米和grabowski （ 1998 ） ，包括潜在
节省能源，劳力，时间，包装费用，并
提高了产品质量。托雷斯，奥利维拉，福
（ 1998 ）指出，素质提高，是因
较高的加热和冷却速度与
连续的处理。李时，辛格，并chandarana
（ 1990 ）也指出，无菌加工人情养分
保存和感官特性，同时确保
商业无菌的产品。然而，有
两个主要障碍，在适用本
技术：一个是确定传热
系数在流体粒子界面，另一方面，
其中涉及到这项研究中，是确定的
热电阻的粒子（蒂斯塔，奥利维拉， sannervik ， ＆
奥利维拉， 1996年） 。