化工学报2017，Vol.68Issue(1)：57-62,6.DOI:10.11949/j.issn.0438-1157.20161272
变径毛细管流量关联式开发
Development of correlation for mass flow rate through varying diameter capillary tube
摘要
Abstract
A varying diameter capillary tube is a low cost throttling device for residential heat pump systems. The asymmetry structure of the varying diameter capillary tube results that forward flow resistance differs from backward one, and then the specific flow rates for cooling and heating mode can be achieved simultaneously. In order to size the capillary tube practically, a dimensionless correlation for predicting mass flow rate through varying diameter capillary tubes is proposed. The formula of equivalent tube diameter and tube length is constructed, and is introduced into an existing correlation for predicting mass flow rate through smooth capillary tube;a numerical model was developed based on the physical equations, and it is used to generate data source for curve fitting the coefficients in the proposed correlation. The proposed correlation can predict the measured mass flow rate through varying diameter capillary tube under various conditions, and it predicted approximately 93%of the measured mass flow rates within a deviation of ±10%.关键词
模型/气液两相流/关联式/毛细管/流动Key words
model/gas-liquid flow/correlation/capillary tube/flow分类
能源科技引用本文复制引用
赵丹,丁国良,徐言生..变径毛细管流量关联式开发[J].化工学报,2017,68(1):57-62,6.基金项目
国家自然科学基金项目（51506117）；中国博士后基金项目(2015M581610)。 （2015M581610）
