实验流体力学2025，Vol.39Issue(6)：53-61,9.DOI:10.11729/syltlx20230119
基于模态分解的动态撞击流反应器流场能量分析
Flow field energy analysis of dynamic impinging stream reactor based on modal decomposition
摘要
Abstract
The study investigates the energy distribution patterns within the flow field of a dynamic impact stream reactor through a combination of experimental and theoretical analysis.The flow field inside the dynamic impact stream reactor is measured using TR-PIV(Time-Resolved Particle Image Velocimetry)technology.Various nozzle spacings,different outlet mean velocities,and different outlet velocity differences are examined to understand the flow structure and energy distribution within the reactor.By performing eigenvalue orthogonal decomposition on the two-dimensional velocity field within the dynamic impact stream reactor,different scale quasi-ordered structures within the flow field and energy characteristics under different eigenmodes are extracted.Large-scale coherent structures in the flow field are distributed in the radial jet region and near the wall surface below the two nozzles.The energy of low-order modes in the reactor's flow field initially increases and then decreases as the nozzle spacing increases,with the highest energy proportion observed at a nozzle spacing of L/d=4.The energy also increases with increasing outlet mean velocity and outlet velocity difference.Under dynamic outlet conditions,the energy proportion in the flow field of the impact stream reactor is higher,and the large-scale coherent structures in the flow field are more pronounced.This significantly enhances momentum exchange within the flow field,contributing to improved mixing efficiency.关键词
动态撞击流/本征正交分解/流场能量/相干结构Key words
dynamic impinging stream/proper orthogonal decomposition/flow field energy/coherent structure分类
化学化工引用本文复制引用
ZHANG Jianwei,LI Zhenhong,DONG Xin,FENG Ying..基于模态分解的动态撞击流反应器流场能量分析[J].实验流体力学,2025,39(6):53-61,9.基金项目
国家自然科学基金项目(21476141) （21476141）
辽宁省"兴辽英才计划"项目(XLYC1808025) （XLYC1808025）
中央引导地方科技发展资金第一批计划项目(2023JH6/100100037) （2023JH6/100100037）
