摘要
环形管道具有结构紧凑、传热面积大、流动性好、传热系数高等显著优点,已经得到了广泛的应用。首先,对环形管道的阻力特性进行分析计算,分析了雷诺数、环形管道间隙、当量直径对阻力系数的影响,发现对于某给定的环形管道,其阻力系数与其对应的雷诺数的乘积为常数,其值约为96。其次,用Fluent软件对环形管道内部流场进行数值模拟,发现环形间隙内流体沿着管道流动方向压力逐渐降低,并且伴随有流速在小范围内升高。
The annular pipeline has been widely used for its significant advantages of the compact construction,the large heat transfer area,the good fluidity,the high heat transfer coefficient,and so on.Firstly,the paper calculates the resistance character of annular pipeline,and analyzes Reynolds numbers,annular pipeline gap,and the influence of equivalent diameter to resistance coefficient.It finds that the product of resistance coefficient and the corresponding Reynolds numbers is a constant for some specific annular pipelines,and the value is about 96.Secondly,the Fluent software is used to make numeral simulate to the inside flow in annular pipeline.It finds that the inside flow in annular pipeline gap will reduce gradually by the gradual reduce of the flowing direction pressure in pipeline,and with the increase of flow rate in a small range.
出处
《长春工程学院学报（自然科学版）》
2015年第2期51-55,共5页
Journal of Changchun Institute of Technology：Natural Sciences Edition
基金
国家自然科学基金(51376148)
关键词
环形通道
阻力特性
数值模拟
annular pipeline
resistance character
numerical simulation
