绝热毛细管基本流动模型的比较分析  

Comparison and Analysis of Basic Flow Models for Adiabatic Capillary Tubes

作　　者：陈鹏熙 张华[1] CHEN Pengxi;ZHANG Hua(School of Energy and Power Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China)

机构地区：[1]上海理工大学能源与动力工程学院,上海200093

出　　处：《制冷技术》2017年第1期55-60,共6页Chinese Journal of Refrigeration Technology

摘　　要：毛细管在小型蒸汽压缩式制冷装置中起到降压、降温和调节流量的作用。在制冷系统的设计中,毛细管的长度和直径与制冷系统的匹配至关重要。传统的方法是通过查阅已编制的毛细管选型图表和经验公式,但结果很不准确且可选制冷剂种类很少,需要结合大量的实验才能确定毛细管的尺寸。经过大量研究,已发展出绝热毛细管内3种流动模型,即均相流动模型、分相流动模型和漂移流动模型。通过比较分析这3种基本流动模型,不仅给制冷系统中毛细管的选型和设计计算提供了参考,而且也为制冷系统的性能优化提供了方向。Capillary tubes in small-scale vapor compression refrigeration systems are applied for decreasing pressure and temperature and controlling refrigerant flux.The length and diameter of capillary tubes matched to the refrigeration system are crucially important for the design of the refrigeration system.The traditional way of selecting an appropriate capillary tube is to look up charts and tables and some empirical correlations.Since the results through these ways are not accurate and the alternative refrigerants are not enough,the dimension of thecapillary tube can be finally determined by amounts of experiments.Based on considerable investigations,three flow models for adiabatic capillary tubes have been developed,namely,the homogeneous flow model,separated flow model and drift flow model.Comparison and analysis on these three basic flow models are performed,providing a reference of selection and design calculation of the capillary tubes and a possible way to optimize the performance of the refrigeration systems.

关 键 词：绝热毛细管 模型 亚稳态 两相流 

分 类 号：TB65[一般工业技术—制冷工程]