工程科学学报，第39卷.第1期：96-106.2017年1月 Chinese Journal of Engineering,Vol.39,No.1:96-106,January 2017 DOI:10.13374/j.issn2095-9389.2017.01.013;http://journals.ustb.edu.cn 分级气体成分对燃气辐射管热过程影响的数值模拟 及研究 徐钱，冯俊小四，周闻华 北京科技大学能源与环境学院，北京100083 ☒通信作者，E-mail:450554190@qq.com 摘要采用现有的双P型辐射管进行燃烧实验，并进行相应的CD仿真对比，结果显示NO,体积分数的数值计算与试验 结果误差最大为36%，其他参数的偏差均在1%以内.将空气分级的理念应用于双P型辐射管，设计一种带支管的分区分级 燃气辐射管，并对其流动和传热特性进行仿真研究.结果表明：支管通入空气量占总空气量的25%时，辐射管壁面温差最大 热效率最高：支管通入燃气量为20%时，辐射管壁面温差最小，壁面温度均匀性最好；支管以相同空燃比同时通入空气和燃 气，且支管通入空燃气量为总燃气量的25%时，整个辐射管内气体温度分布最均匀：支管通入空燃气量占总气体量从5%增 加到35%的过程中，壁面温差先降低后缓慢增加，支管通入燃气量为20%时辐射管壁面温差最小. 关键词燃烧：辐射管：空燃比；模型验证：氨氧化物控制 分类号TP062 Numerical simulation and research on the effect of the classification of gas composition on the heat process of gas radiation tubes XU Qian,FENG Jun-xiao ZHOU Wen-hua School of Energy and Environmental Engineering.University of Science and Technology Beijing,Beijing 100083,China Corresponding author,E-mail:450554190@qq.com ABSTRACT The combustion experiment of an existing double P type radiant tube and the corresponding CFD simulation were per- formed in this paper.By contrast,the maximum error of NO,concentration between numerical calculation and experimental data is 3.6%,and the deviation of the other parameters is less than 1%.Then the concept of air classification was applied to the double P type radiation tube to design a belt pipe nozzle hierarchical gas-fired radiant tube.The flow and heat transfer characteristics were stud- ied.The results show that when air into the branch pipe accounts for 25%of the total amount of air,the radiant tube wall temperature and thermal efficiency are the highest.When the content of gas into the branch is 20%,the radiation tube wall temperature realizes the minimization and the uniformity of wall temperature is the best.When both air and gas at the same air-fuel ratio are introduced in- to the branch pipe,and the volume of air and fuel gas is 25%of the total amount of gas,the gas temperature distribution in the radiant tube is the most uniform.When the volume of air and fuel gas into the branch pipe increases from 5%to 35%,the wall surface tem- perature decreases first and then increases slowly;when it is 20%,the radiation tube wall temperature reaches a minimum. KEY WORDS combustion;gas fired radiant tubes;air-fuel ratio;model validation;nitrogen oxide control 燃气辐射管是一种间接加热元件，主要由烧嘴、热，由管壁间接把热量主要以辐射的方式传给炉衬 辐射管体和余热回收装置组成，燃料在管内燃烧发 和被处理工件，广泛应用于热处理行业的各种加热 收稿日期：2016-04-07 基金项目：重点研发计划（产业前瞻与共性关键技术）资助项目(BE2015206)工程科学学报,第 39 卷,第 1 期:96鄄鄄106,2017 年 1 月 Chinese Journal of Engineering, Vol. 39, No. 1: 96鄄鄄106, January 2017 DOI: 10. 13374 / j. issn2095鄄鄄9389. 2017. 01. 013; http: / / journals. ustb. edu. cn 分级气体成分对燃气辐射管热过程影响的数值模拟 及研究 徐 钱, 冯俊小苣 , 周闻华 北京科技大学能源与环境学院, 北京 100083 苣 通信作者, E鄄mail: 450554190@ qq. com 摘 要 采用现有的双 P 型辐射管进行燃烧实验,并进行相应的 CFD 仿真对比,结果显示 NOx 体积分数的数值计算与试验 结果误差最大为 3郾 6% ,其他参数的偏差均在 1% 以内. 将空气分级的理念应用于双 P 型辐射管,设计一种带支管的分区分级 燃气辐射管,并对其流动和传热特性进行仿真研究. 结果表明:支管通入空气量占总空气量的 25% 时,辐射管壁面温差最大, 热效率最高;支管通入燃气量为 20% 时,辐射管壁面温差最小,壁面温度均匀性最好;支管以相同空燃比同时通入空气和燃 气,且支管通入空燃气量为总燃气量的 25% 时,整个辐射管内气体温度分布最均匀;支管通入空燃气量占总气体量从 5% 增 加到 35% 的过程中,壁面温差先降低后缓慢增加,支管通入燃气量为 20% 时辐射管壁面温差最小. 关键词 燃烧; 辐射管; 空燃比; 模型验证; 氮氧化物控制 分类号 TF062 Numerical simulation and research on the effect of the classification of gas composition on the heat process of gas radiation tubes XU Qian, FENG Jun鄄xiao 苣 , ZHOU Wen鄄hua School of Energy and Environmental Engineering, University of Science and Technology Beijing, Beijing 100083, China 苣Corresponding author, E鄄mail: 450554190@ qq. com ABSTRACT The combustion experiment of an existing double P type radiant tube and the corresponding CFD simulation were per鄄 formed in this paper. By contrast, the maximum error of NOx concentration between numerical calculation and experimental data is 3郾 6% , and the deviation of the other parameters is less than 1% . Then the concept of air classification was applied to the double P type radiation tube to design a belt pipe nozzle hierarchical gas鄄fired radiant tube. The flow and heat transfer characteristics were stud鄄 ied. The results show that when air into the branch pipe accounts for 25% of the total amount of air, the radiant tube wall temperature and thermal efficiency are the highest. When the content of gas into the branch is 20% , the radiation tube wall temperature realizes the minimization and the uniformity of wall temperature is the best. When both air and gas at the same air鄄鄄fuel ratio are introduced in鄄 to the branch pipe, and the volume of air and fuel gas is 25% of the total amount of gas, the gas temperature distribution in the radiant tube is the most uniform. When the volume of air and fuel gas into the branch pipe increases from 5% to 35% , the wall surface tem鄄 perature decreases first and then increases slowly; when it is 20% , the radiation tube wall temperature reaches a minimum. KEY WORDS combustion; gas fired radiant tubes; air鄄鄄fuel ratio; model validation; nitrogen oxide control 收稿日期: 2016鄄鄄04鄄鄄07 基金项目: 重点研发计划(产业前瞻与共性关键技术)资助项目(BE2015206) 燃气辐射管是一种间接加热元件,主要由烧嘴、 辐射管体和余热回收装置组成,燃料在管内燃烧发 热,由管壁间接把热量主要以辐射的方式传给炉衬 和被处理工件,广泛应用于热处理行业的各种加热