化工进展2017，Vol.36Issue(11)：3963-3970,8.DOI:10.16085/j.issn.1000-6613.2017-1083
挡板的相对曲率对分离器入口局域流场流体力学性能的影响
Effect of inlet baffle curvature ratio on the local flow fields in a separator
摘要
Abstract
The purpose of this paper is to investigate the flow characteristics of local flow field in the vertical cylinder separator with inlet baffle at different curvature ratios (K). Computational fluid dynamics (CFD) was used to numerically calculate the three-dimensional turbulent flow for separators. The effect of K values was researched within the scope of -0.15—0.25 and baffles were classified into concave surface K>0,plate K=0 and convex surface K<0. The stagnation pressure and local resistance were calculated. Water was used as working fluid. The mechanism was analyzed at different K values about impinging jet in limited narrow space of separator inlet.The results showed that the impact on the baffle wall and the local flow resistance declines with the decrease of the curvature ratio K in the separator inlet. The average local resistance coefficient of K = -0.1 is 2.8％ lower than that of K=0,and K = 0.1 is 2.0％ higher. The local flow structures and the static pressure distribution were altered by different K. For the case of concave surface,jet expansion was limited in the impacted area due to the enlarging of jet exit-to-surface distance L. On the contrary,the convex surface was beneficial to the impinging jet expansion. Distribution of tangential velocity in wall jet region and baffle outlet was deeply affected by impacted area.关键词
挡板/相对曲率/数值模拟/局域流场Key words
baffle/curvature ratio/numerical simulation/local flow field分类
数理科学引用本文复制引用
张静,刘晓亮,龚斌,李雅侠,吴剑华..挡板的相对曲率对分离器入口局域流场流体力学性能的影响[J].化工进展,2017,36(11):3963-3970,8.基金项目
国家自然科学基金(51506133)、辽宁省自然科学基金(201602595)及辽宁省博士科研启动基金(201601199)项目. （51506133）
