化工进展2023，Vol.42Issue(11)：5602-5611,10.DOI:10.16085/j.issn.1000-6613.2022-2289
带稳定翼四斜叶-Rushton组合桨搅拌釜内传热性能
Heat transfer performance in stirred tank with four-pitched blade with stabilizing fins-Rushton combined impellers
摘要
Abstract
The heat transfer performance of a stirred tank with the four-pitched blade with stabilizing fins-Rushton combined impellers and helical coils was studied based on the combination of computational fluid dynamics(CFD)simulation and heat transfer experiments.The flow distribution,temperature distribution,temperature boundary layer and Nusselt number outside the coil were obtained.The results showed that the error of temperature between experimental measurement and numerical simulation was less than 4K.The high temperature area in the stirred tank was located in the circulating large eddy current area at the coil,and the maximum temperature difference was kept within 3K.The stabilizer fins could improve liquid axial-flow performance and make the temperature distribution of the stirred tank more uniform.The average temperature boundary layer thickness of XZ plane and YZ plane outside the inner coil was 3.01mm and 2.70mm,respectively.According to experimental data and numerical simulation,it was found that the order of influence of different factors on the Nusselt number outside the inner coil was as follows:viscosity of the mixing medium>mixing speed>blade spacing>distance from the bottom.The maximum error of Nusselt number between experiment and simulation was 14.56% ,and the minimum error was 4.23% ,which verified the feasibility of numerical simulation well.The research results can provide a reference for the application of the four-pitched blade with stabilizing fins-Rushton combined impellers in the practical industry.关键词
带稳定翼四斜叶-Rushton组合桨/传热性能/温度分布/温度边界层/努塞尔数Key words
four-pitched blade with stabilizing fins-Rushton combined impellers/heat transfer/temperature distribution/temperature boundary layer/Nusselt number分类
化学化工引用本文复制引用
赵金明,秦晓波,徐阳,史亦航,周勇军..带稳定翼四斜叶-Rushton组合桨搅拌釜内传热性能[J].化工进展,2023,42(11):5602-5611,10.基金项目
国家自然科学基金(52175171). （52175171）
