张建伟,刘名扬,董鑫,冯颖
ZHANG Jianwei,LIU Mingyang,DONG Xin,FENG Ying

• 1:沈阳化工大学机械与动力工程学院

摘要(Abstract)：

为了研究振荡射流撞击流反应器内流场特性，利用SST k-ω湍流模型，建立振荡射流撞击流反应器数学模型且与试验进行对比。通过分析速度场、湍流动能分布、压力场和湍流黏度分布规律来研究撞击流反应器内部流动特性，揭示混合性能变化规律。结果表明：在轴向上，速度、湍动能和压力呈多峰分布趋势且随着入口速度的上升而不断增大。在径向上，振荡器混合室内部涡旋中心受喷嘴小尺度涡旋干扰不断变化，从而影响流体振荡，使流场内产生4种流型。该反应器在35 s后混合均匀，混合强度达到0.95以上。研究结果丰富了流体振荡特性理论，为新型反应装置的开发提供理论参考。
In order to study the flow field characteristics in the oscillating jet impinging stream reactor，the CFD numerical simulation method was used to establish the mathematical model of the oscillating jet impinging stream reactor by using the SST k-ω turbulence model and compared with the experiment.By analyzing the velocity field，turbulent kinetic energy distribution，pressure field and turbulent viscosity distribution，the internal flow characteristics of the impinging stream reactor were studied，and the change rule of mixing performance was revealed.The results show that in the axial direction，the velocity，turbulent kinetic energy and pressure show a multi-peak distribution trend and increase with the increase of inlet velocity.In the radial direction，the vortex center inside the oscillator mixing chamber is constantly changing due to the small-scale vortex interference of the nozzle，which affects the fluid oscillation and produces four flow patterns in the flow field.The reactor reaches uniform mixing after35 s，and the mixing intensity reaches more than 0.95.The research results enrich the theory of fluid oscillation characteristics and provide a theoretical reference for the development of new reaction devices.

关键词(KeyWords)： 撞击流;振荡;流动特性;混合性能
impinging stream;oscillation;flow characteristics;mixing performance

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金项目(21476141);; 辽宁省教育厅科学研究经费项目(LQ2020017;LJ2020036);; 辽宁省“兴辽英才计划”高水平创新创业团队项目(XLYC1808025);; 中央引导地方科技发展资金第一批计划项目(2023JH6/100100037)

作者(Author): 张建伟,刘名扬,董鑫,冯颖
ZHANG Jianwei,LIU Mingyang,DONG Xin,FENG Ying

参考文献(References)：

• [1]周玉新，曲志鹏，熊伟，等.撞击流反应器脱除硫酸尾气中SO2的研究[J].化学工程，2016，44(4)：18-21.ZHOU Y X，QU Z P，XIONG W，et al.Removal of sulfur dioxide in the sulfuric acid tail gas in impinging stream gas-liquid reactor[J].Chemical Engineering，2016，44(4)：18-21.
• [2]SONG Y，LIU X Q.Study of the drying characteristics in an asymmetric impinging stream reactor[J].Chemical Papers，2021，75：4355-4370.
• [3]SAHOO K.Green synthesis of sub 10 nm silver nanoparticles in gram scale using free impinging jet reactor[J].Chemical Engineering and Processing-Process Intensification，2021，165：108439.
• [4]罗燕，周剑秋，郭钊，等.液体连续相撞击流反应器中流体混合时间的数值模拟[J].化工学报，2015，66(6)：2049-2054.LUO Y，ZHOU J Q，GUO Z，et al.Numerical simulation of fluid mixing time in liquid impinging streams reactor [J].CIESC Journal，2015，66(6)：2049-2054.
• [5]ZHANG J W，TANG J，DONG X，et al.The extension characteristics and mixing effect of the secondary impact surface in double-layer impinging stream mixer [J].Brazilian Journal of Chemical Engineering，2022，40(1)：169-176.
• [6]郭栋，梁海峰.气液混合式撞击流反应器流场特性数值模拟[J].过程工程学报，2021，21(3)：277-285.GUO D，LIANG H F.Numerical simulation of flow field characteristics of gas-liquid mixed impinging stream reactor[J].The Chinese Journal of Process Engineering，2021，21(3)：277-285.
• [7]ZHANG J W，LIU M Y，TANG J，et al.Structure optimization and flow field characteristics of baffle-type impinging stream reactor[J].Chemical Engineering and Processing-Process Intensification，2023，189.
• [8]STOUFFER R D.Oscillating spray device：U.S.Patent 4151955[P].1979-05-08.
• [9]吾特库尔·努尔买买提，刘学武，张瑞丹，等.音波管长度对射流振荡器性能的影响[J].流体机械，2022，50(3)：19-25.WUTEKUER N，LIU X W，ZHANG R D，et al.The effect of sound wave tube length on the performance of jet oscillator[J].Fluid Machinery，2022，50(3)：19-25.
• [10]赵钰，龚盼，刘志刚，等.新型射流振荡器工作原理与试验研究[J].流体机械，2018，46(9)：13-17.ZHAO Y，GONG P，LIU Z G，et al.Working principle and experimental research of a new type fluidic oscillator[J].Fluid Machinery，2018，46(9)：13-17.
• [11]WU Y J，YU S F，ZUO L.Large eddy simulation analysis of the heat transfer enhancement using self-oscillating fluidic oscillators[J].International Journal of Heat and Mass Transfer，2019，131：463-471.
• [12]LIU Z Q，PAN T Y，WANG S Q，et al.Characteristics of a fluidic oscillator with low frequency and low speed and its application to stall margin improvement[J].Actuators，2022，11(12)：341-341.
• [13]LEE E C，CHA S W，KWON H S，et al.A numerical study on the characteristics of air-fuel mixing using a fluidic oscillator in supersonic flow fields[J].Energies，2019，12(24)：4758.
• [14]别海燕，李云霞，安维中，等.流体振荡器气泡碎化特性数值模拟[J].高校化学工程学报，2023，37(1)：53-60.BIE H Y，LI Y X，AN W Z，et al.Numerical simulation of bubble breakup characteristics in a fluidic oscillator [J].Journal of Chemical Engineering of Chinese Universities，2023，37(1)：53-60.
• [15]别海燕，黄晨，安维中，等.正反馈式流体振荡器内部流动特性的数值模拟[J].化工学报，2021，7(3)：1504-1511.BIE H Y，HUANG C，AN W Z，et al.Numerical simulation of internal flow characteristics of feedback fluidic oscillator[J].CIESC Journal，2021，72(3)：1504-1511.
• [16]SANG Y J，SHAN Y，ZHANG J Z，et al.Investigation on flow mechanism and impingement heat transfer performance of combined fluidic oscillators[J].Thermal Science and Engineering Progress，2023，37：101564.
• [17]LI M，LEI Z J，DENG H L，et al.Numerical research on the jet-mixing mechanism of convergent nozzle excited by a fluidic oscillator and an air tab[J].Energies，2023，16(3)：1412.
• [18]HOSSAIN M A，AGRICOLA L，AMERI A，et al.Effects of exit fan angle on the heat transfer performance of sweeping jet impingement[C]// International Energy Conversion Engineering Conference，2023.
• [19]HOSSAIN M A，AGRICOLA L，AMERI A，et al.Effects of curvature on the performance of sweeping jet impingement heat transfer[C]//AIAA Aerospace Sciences Meeting，2018.
• [20]孔祥灿，张子卿，李国庆，等.扫掠冲击-气膜冷却结构的气动传热特性数值研究[J].推进技术，2022，43(10)：179-191.KONG X C，ZHANG Z Q，LI G Q.Numerical investigation on aerodynamic and heat transfer characteristics of sweeping impingement and film composite cooling structure[J].Journal of Propulsion Technology，2022，43(10)：179-191.
• [21]LIU Z，YE L，WANG C，et al.Numerical simulation on impingement and film composite cooling of blade leading edge model for gas turbine[J].Applied Thermal Engineering，2014，73(2)：1432-1443.
• [22]叶飞，刘新阳，赵礼，等.自激吸气式脉冲射流装置机理的试验和理论研究[J].流体机械，2023，51(3)：1-7.YE F，LIU X Y，ZHAO L，et al.Experimental and theoretical researches on mechanism of self-excited aspiration pulse jet device[J].Fluid Machinery，2023，51(3)：1-7.
• [23]FLORIAN O，RENE W，NAVID C N，et al.Properties of a sweeping jet emitted from a fluidic oscillator[J].Journal of Fluid Mechanics，2018，857：216-238.
• [24]FLORIAN O，PHILIPP G，RENE W，et al.Sweeping jet from a fluidic oscillator in crossflow[J].Physical Review Fluids，2017，2(9)：090512.