特种车排气管消声器优化设计及温度场数值分析
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摘要
为降低危险品运输车排气管中尾气温度过高或夹带火星颗粒对装载车上的易燃易爆品产生安全隐患,运用ANSYS Workbench集成平台和Fluent软件对某型危险品运输车排气管总成中的4种消声器结构进行流体特性和温度场研究,选取4种冷却液入口流速对设计的4种消声器结构进行流、固和热耦合数值模拟计算。分析结果表明:当入口流速为2 m/s时,C型结构消声器的降温效果最佳,最低温度能降到84.98℃。研究结果可为特种车辆排气管主消声器降温结构优化提供参考。
In order to decrease the risks of dangerous goods transport vehicles exhaust pipe that temperature of exhaust gas was too high or sparks might light inflammable and explosive materials on the car, ANSYS Workbench platform and Fluent software were used to research the fluid properties and temperature field of four types of muffler assembly structure in a certain type of exhaust pipe of dangerous goods transport vehicle.Four kinds of coolant inlet entrance velocity were selected to make numerical simulation of flow and thermal solid coupling for four different kinds of muffler structure. The results show that when the inlet velocity is 2 m/s, the cooling effect of the C type structure muffler is the best which minimum temperature can be decreased to 84.98 ℃.The results provide reference for the cooling structure optimization of the main muffler of the special vehicles exhaust pipe.
In order to decrease the risks of dangerous goods transport vehicles exhaust pipe that temperature of exhaust gas was too high or sparks might light inflammable and explosive materials on the car, ANSYS Workbench platform and Fluent software were used to research the fluid properties and temperature field of four types of muffler assembly structure in a certain type of exhaust pipe of dangerous goods transport vehicle.Four kinds of coolant inlet entrance velocity were selected to make numerical simulation of flow and thermal solid coupling for four different kinds of muffler structure. The results show that when the inlet velocity is 2 m/s, the cooling effect of the C type structure muffler is the best which minimum temperature can be decreased to 84.98 ℃.The results provide reference for the cooling structure optimization of the main muffler of the special vehicles exhaust pipe.
引文
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[2] 王志刚.考虑气流和温度因素的内燃叉车排气消声器声学性能研究[D].杭州:浙江工业大学,2016.
[3] DEGER Y,SIMPERL B,JIMENEZ L P.Coupled CFD-FE-analysis for the Exhaust Manifold of a Diesel Engine[C]//Proceedings of ABAQUS Users’ Conference,2004.
[4] 王继佳,姚广涛,张卫锋,等.发动机排气降温装置设计与仿真优化研究[J].内燃机与配件,2017(13):6-10.WANG J J,YAO G T,ZHANG W F,et al.The Research of the Device Design and Simulation Optimization for Exhaust Gas Cooling of Engine[J].Internal Combustion Engine & Parts,2017(13):6-10.
[5] 李奇,寇子明.文丘里管射流器的主要性能参数研究[J].煤矿安全,2009,40(6):5-7.LI Q,KOU Z M.Primary Performance Parameter Study on Jet Aerator of Venturi[J].Safety in Coal Mines,2009,40(6):5-7.
[6] 葛晓光.发动机排气系统仿真分析与研究[D].天津:河北工业大学,2010.
[7] 於俊杰,蒋政,康守方,等.Cu-Mg/Al复合氧化物催化碳颗粒物燃烧性能的研究[J].物理化学学报,2004,20(12):1459-1464.YU J J,JIANG Z,KANG S F,et al.Catalytic Combustion of Soot over Cu-Mg/Al Composite Oxides[J].Acta Physico-Chimica Sinica,2004,20(12):1459-1464.
[8] 马志振,左承基.发动机排气系统热动力学建模与仿真[C]//内燃机学会2015年联合学术年会论文集,2015.
[9] 张传芳.基于CFD的多片离合器摩擦片间流体特性研究[D].长春:吉林大学,2014:20-22.
[10] 游红武,王志刚,李明辉,等.内燃叉车排气消声器内流场及温度场数值分析[J].浙江工业大学学报,2017,45(2):142-146.YOU H W,WANG Z G,LI M H,et al.Numerical Analysis of the Flow and Temperature Fields Inside an Internal Combustion Forklift Exhaust Muffler[J].Journal of Zhejiang University of Technology,2017,45(2):142-146.
[11] 牛鑫淼.汽车排气管内部气体状态分析[D].哈尔滨:东北林业大学,2014.
[12] 陈功.发动机燃烧过程对排气温度影响分析及试验研究[D].哈尔滨:东北林业大学,2013.
[13] 崔淑华,牛鑫淼.发动机燃烧乙醇汽油的排气温度试验与分析[J].森林工程,2013,29(2):115-116.CUI S H,NIU X M.Experiment and Analysis on Exhaust Temperature by Burning Ethanol Gasoline[J].Forest Engineering,2013,29(2):115-116.
[14] 李思文,李华,杨臧健,等.光管内湍流脉动传热影响因素的实验研究[J].浙江工业大学学报,2013,41(4):395-399.LI S W,LI H,YANG Z J,et al.Experimental Study on Influencing Factors of Pulsating Heat Transfer in Turbulent Flow in a Pipe[J].Journal of Zhejiang University of Technology,2013,41(4):395-399.