Steady State Forced Convection Heat Transfer in He II
Steady State Forced Convection Heat Transfer in He II
复制标题
He II 中的稳态强制对流换热
DOI：
10.1007/978-1-4613-2213-9_56
复制
发表时间：
1986
期刊：
影响因子：
--
通讯作者：
S. V. Sciver
中科院分区：
文献类型：
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作者：
A. Kashani;S. V. Sciver
为了更好地理解超流氦（He II）中的强制对流传热过程，并将其与人们更熟悉的He II内对流传热机制进行比较，本文对He II中的强制对流传热进行了研究。设计了一个实验组件，通过一个电动液压泵，利用两个不锈钢波纹管实现流体流动。每个波纹管连接到一个直径为3 mm、长2 m的铜管的一端。该系统允许测量一维传热和传质，其中测量的量包括：温度分布和压降。变量是氦浴温度、流速和热输入。氦浴保持在1.8 K和饱和压力下。流管在中部加热，流速变化高达97 cm/s。在管的两端监测氦气压力，并估计He II的摩擦系数。温度测量是在沿管沿着的七个均匀间隔的位置进行的。实验温度分布进行了比较与数值解的分析模型开发的研究中的问题。
A study of forced convection heat transfer in superfluid helium (He II) is initiated to better understand the physical behavior of this process and to compare it with the more familiar He II heat transfer mechanism of internal convection. An experimental assembly is designed to achieve fluid flow by a motor-driven hydraulic pump which utilizes two stainless steel bellows. Each bellows is connected to one end of a copper tube, 3 mm in diameter and 2 m long. The system allows measurements of one dimensional heat and mass transfer where the measured quantities include: temperature profile and pressure drop. The variable quantities are the helium bath temperature, flow velocity and heat input. The helium bath is held at 1.8 K and under saturation pressure. The flow tube is heated at the middle and the flow velocity is varied up to 97 cm/s. The helium pressure is monitored at both ends of the tube and a friction factor is estimated for He II. Temperature measurements are made at seven evenly spaced locations along the tube. The experimental temperature profile is compared with a numerical solution of an analytical model developed for the problem under study.