南京理工大学学报（自然科学版）2023，Vol.47Issue(6)：824-835,12.DOI:10.14177/j.cnki.32-1397n.2023.47.06.012
双平行平面射流与环境流基元反应特性研究
Elementary reaction characteristics of dual-plane jet flow and ambient flow
摘要
Abstract
In order to reveal the scalar transport mechanism of the flow-chemical reaction coupling process between the dual-plane jet and the environmental flow,the large eddy simulation method is used to study the reaction condition of the dual-plane jet and the environmental flow with the second-order non-equilibrium elementary reaction(A+B→R).In the study,the Damköhler number(Da)is1 and the Reynolds number is 2 000.Firstly,through the numerical simulation of a single reactive jet,the statistics such as the mean streamwise velocity and the mean mixture concentration fraction are compared with the previous results to verify the accuracy of present numerical method.Secondly,based on the chemical reaction scalar transport equation,the scalar transport and chemical reaction characteristics of reactive dual-plane jet in flow-chemical reaction coupling process are studied.The results show that near the turbulent/non-turbulent interface(T/NTI)upstream of the flow field,there is a region where reactant B is consumed sharply,and the entrainment process of T/NTI profoundly affects the chemical reaction;the chemical reaction mainly occurs in the upstream of the flow field,the unsteady change of product R at a certain time near T/NTI is almost determined by the chemical reaction and advection transport process,while the unsteady change of product R at a certain time in the turbulent region downstream of the flow field mainly depends on the advection;when the mean statistics are carried out,the transport of streamwise advection and the transport of normal advection on product R budget in the range of 6<x/d<20.关键词
双平行平面射流/环境流/基元反应/大涡模拟方法/标量输运方程/湍流/计算流体力学/对流输运过程Key words
dual-plane jet flow/ambient flow/elementary reaction/large eddy simulation method/scalar transport equation/turbulent flow/computational fluid dynamics/advection transport process分类
数理科学引用本文复制引用
李岩,曹晴晴,周毅..双平行平面射流与环境流基元反应特性研究[J].南京理工大学学报（自然科学版）,2023,47(6):824-835,12.基金项目
国家自然科学基金(91952105 （）
11802133) （）
中央高校基本科研业务费专项基金(30921011212) （30921011212）
江苏省"六大人才高峰"资助项目(2019-SZCY-005) （2019-SZCY-005）
