【作者】 周勤；

【导师】 刘楚芸；

【作者基本信息】 浙江大学 ， 制冷与低温工程， 2003， 硕士

【摘要】 本文探讨了毛细管内制冷剂两相流动特性的实验研究与理论分析方法。针对广泛应用于小型制冷装置内的毛细管，分析了毛细管内制冷剂的两相流动过程，运用两相流动的漂移流模型建立了毛细管的稳态数学模型，对毛细管内制冷剂的流动特性进行了数值计算；同时对数值计算进行了实验验证，搭建了毛细管两相流研究的实验装置，数值计算与实验数据得到了较好的吻合；并数值分析了影响各参数变化的决定因素。 此外，本文还完善了基于Visual C++6.0的均相流绝热毛细管数值模拟，软件提供了工质和参数选择，并数值分析了两种制冷剂R12、R134a在毛细管内的流动特性。更多还原

【Abstract】 This paper mainly describes how to experimentally study and theoretically analyze the two-phase flow characteristics of refrigerants in capillary tubes. I analyze the flow characteristics of refrigerants flowing through capillary tubes used as expansion devices in small vapor compression refrigeration systems. Based on two-phase drift flux assumption for the wwo-phase region, a mathematical mode! of capillary tube is developed to simulate the flow of refrigerant in the capillary tube. This paper also presents an experimental study on capillary tubes. Attempts have been made to compare predictions with experimental results. The predictions from the developed model are found to be in good agreement with the measured data and other studies in the literature. The numerical model also allows simulation and analysis of the different effects of main parameters.Furthermore, the paper attempts to exploit the homogeneous two-phase flow model to simulate the flow of refrigerant in the adiabatic capillary tube, which is based on Visual C++ 6.0. The model includes the select of various refrigerants and various parameters. The paper also numerically simulates and analyzes the flow of refrigerants, namely R12 and R134a respectively in the adiabatic capillary tube.更多还原