原子能科学技术2016，Vol.50Issue(8)：1375-1380,6.DOI:10.7538/yzk.2016.50.08.1375
90°弯头内流体压力脉动特性的大涡数值模拟
Large Eddy Simulation of Pressure Fluctuation in 90°Elbow Pipe
摘要
Abstract
Based on the special application of 90°elbow pipe in the 10 MW High Tem-perature Gas-cooled Reactor (HTR-10),the large eddy simulation was used to compute the complex flow field in 90°elbow pipe.The time-averaged results were compared with the experimental results and the RANS results.The pressure fluctuation signal of the specific test point on intrados and extrados was processed by Fourier transform to get the power spectral density.Under the influence of impact effect,flow separation and the secondary flow, the pressure fluctuation behaves differently on intrados and extrados.The pressure fluctuation on intrados is caused by flow separation and vortex-shedding,and the maximum fluctuation amplitude occurs at the bending angle of 50°. On extrados,it is induced by the impact effect,and the maximum fluctuation amplitude occurs at the bending angle of 12°.关键词
10 MW 高温气冷堆/90°弯头/大涡模拟/压力脉动Key words
10 MW High Temperature Gas-cooled Reactor/90°elbow pipe/large eddy simulation/pressure fluctuation分类
能源科技引用本文复制引用
王世明,任成,杨星团,孙艳飞..90°弯头内流体压力脉动特性的大涡数值模拟[J].原子能科学技术,2016,50(8):1375-1380,6.基金项目
高等学校博士学科点专项科研基金资助课题(20130002120015) （20130002120015）
清华大学自主科研计划资助项目(2014z21023) （2014z21023）
国家自然科学基金资助项目(51506114) （51506114）
