化工学报2016，Vol.67Issue(10)：4118-4125,8.DOI:10.11949/j.issn.0438-1157.20151891
分体管壳式余热锅炉内摩擦及局部压降
Frictional and local pressure drops in waste heat recovery boiler of split shell-tube structure
邵怀爽 1马海东 1陈杰 2时明伟 2胡涛 2赵钦新1
作者信息
- 1. 西安交通大学热流科学与工程教育部重点实验室，陕西西安 710049
- 2. 北京航天石化技术装备工程有限公司，北京 100166
- 折叠
摘要
Abstract
The calculation of frictional and local pressure drops inside lower shell tubes upon a vapor-liquid two-phase flow running through horizontal tube bundles was studied on a visualizable experimental platform of split shell-tube waste heat recovery boiler. PIV flow velocity measurement technique was combined with traditional differential pressure method to measure cross-sectional vapor fraction in vertical upward tubes. A new method for calculating cross-sectional vapor fraction was proposed according to the bubble flow pattern. A new bubble-slug flow pattern was defined with vapor mass fractionx=10−4as the boundary condition to distinguish bubble flow and bubble-slug flow in vertical upward tubes. Based on the similarity of their occurrences under a circumstance of a vapor-liquid two-phase flow running through horizontal tube bundles, both frictional and local pressure drops were analyzed integrally. A new correlation equation to calculate frictional and local pressure drops was obtained after processed experimental data by the Chisholm method and studied calculation of frictional and local pressure drops. Validation of the correlation equation with experimental data showed an error within±20%, indicating that the equation could meet the needs of engineering calculation.关键词
余热锅炉/压降/气液两相流/粒子图像测速Key words
heat recovery boiler/pressure drop/gas-liquid flow/PIV分类
能源科技引用本文复制引用
邵怀爽,马海东,陈杰,时明伟,胡涛,赵钦新..分体管壳式余热锅炉内摩擦及局部压降[J].化工学报,2016,67(10):4118-4125,8.
