O_2/CO_2环境对柴油燃烧特性的影响
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摘要
为计算柴油在O_2/CO_2环境中火焰浮起长度(flame lift-off length,FLOL),提出了柴油的耦合计算模型。该模型基于空气卷吸率计算公式,考虑了O_2和CO_2对FLOL的影响,引入空气与燃料的动态化学当量比,得到了O_2/CO_2环境中FLOL的计算公式。运用Converge软件对柴油的表征燃料正庚烷建立化学模型和物理模型,搭建了定容燃烧弹可视化试验台。对柴油在空气、50%O_2/50%CO_2和57%O_2/43%CO_2环境中的FLOL进行计算与试验,并对燃烧过程、温度云图和FLOL进行了分析。结果表明:该模型能计算柴油在O_2/CO_2环境中的FLOL,计算的最大平均误差为8. 6%。
In order to calculate the flame lift-off length( FLOL) in O_2/CO_2 environments,a coupled calculation model of diesel was proposed. Based on the calculation formula of air entrainment rate,this model considered the effect of O_2 and CO_2 on FLOL,introduced the dynamic chemical equivalent ratio of air and fuel,and obtained the calculation formula of FLOL in O_2/CO_2 environment. The chemical model and physical model of fuel n-heptane were established by the software Converge to characterize diesel. FLOL was calculated and tested in air,50% O_2/50% CO_2 and 57% O_2/43% CO_2,then combustion process,temperature nodal data and FLOL were analyzed. The results show that this model can calculate FLOL of diesel in O_2/CO_2 environment,the maximum average error is 8. 6%.
In order to calculate the flame lift-off length( FLOL) in O_2/CO_2 environments,a coupled calculation model of diesel was proposed. Based on the calculation formula of air entrainment rate,this model considered the effect of O_2 and CO_2 on FLOL,introduced the dynamic chemical equivalent ratio of air and fuel,and obtained the calculation formula of FLOL in O_2/CO_2 environment. The chemical model and physical model of fuel n-heptane were established by the software Converge to characterize diesel. FLOL was calculated and tested in air,50% O_2/50% CO_2 and 57% O_2/43% CO_2,then combustion process,temperature nodal data and FLOL were analyzed. The results show that this model can calculate FLOL of diesel in O_2/CO_2 environment,the maximum average error is 8. 6%.
引文
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3 张剑波,朱炜青.闭式循环柴油机的模拟计算与试验研究[J].工程热物理学报,1988,9(1):19-21Zhang Jianbo,Zhu Weiqing. Simulating computation and experimental study of the closed-cycle diesel engine[J]. Journal of Engineering Thermophysics,1988,9(1):19-21
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5 裴普成,刘永峰.液氧固碳零排放内燃机:201010519636. 9[P].2012-12-26Pei Pucheng,Liu Yongfeng. Liquid oxygen-fixed carbon zero emission internal combustion engine:201010519636. 9[P]. 2012-12-26
6 Liu Yongfeng,Jia Xiaoshe,Pei Pucheng,et al. Simulation and experiment for oxygen-enriched combustion engine using liquid oxygen to solidify CO2[J]. Chinese Journal of Mechanical Engineering,2016,29(1):188-194
7 姚春德,刘增勇,孙家峰,等.进气加入CO2对直喷式柴油机燃烧的影响[J].工程热物理学报,2003(4):707-710Yao Chunde,Liu Zengyong,Sun Jiafeng,et al. Effect of CO2added in intake air on combustion process in diesel engine[J]. Journal of Engineering Thermophysics,2003(4):707-710
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9 赵昌普,陈生齐,孙强,等.直喷柴油机火焰浮起长度的数值模拟研究[J].工程热物理学报,2009,30(10):1791-1794Zhao Changpu,Chen Shengqi,Sun Qiang,et al. Numerical study of flame lift-off length in a diesel engine[J]. Journal of Engineering Thermophysics,2009,30(10):1791-1794
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11 Taskiran O O,Ergeneman M. Effect of nozzle dimensions and fuel type on flame lift-off length[J]. Fuel,2014,115(1):833-840
12 陈汉玉,左承基,王作峰,等. O2/CO2环境下柴油机燃烧特性数值模拟[J].农业机械学报,2014,45(1):27-33Chen Hanyu,Zuo Chengji,Wang Zuofeng,et al. Numerical simulation on diesel engine combustion characteristics in O2/CO2environment[J]. Transactions of the Chinese Society of Agricultural Machinery,2014,45(1):27-33
13 王作峰,左承基,陈汉玉,等. ZS195柴油机无氮(O2/CO2)燃烧的排放特性[J].合肥工业大学学报(自然科学版),2013,36(3):257-260Wang Zuofeng,Zuo Chengji,Chen Hanyu,et al. Emission characteristics of ZS195 diesel engine under O2/CO2combustion condition[J]. Journal of Hefei University of Technology,2013,36(3):257-260
14 王对对,左承基,王作峰,等.无氮(O2/CO2)环境下柴油机燃烧规律的试验研究[J].合肥工业大学学报(自然科学版),2013,36(6):664-666Wang Duidui,Zuo Chengji,Wang Zuofeng,et al. Experimental research on the diesel combustion rules in the condition of no nitrogen(O2/CO2)[J]. Journal of Hefei University of Technology,2013,36(6):664-666
15 Siebers D L,Higgins B,Pickett L. Flame lift-off on direct-injection diesel fuel jets:oxygen concentration effects[C]//SAE 2002 World Congress&Exhibition. New York:SAE Technical Papers,2002:10890
16 Wu Y F,Huang R H,Liu Y,et al. Effect of ambient temperature on flame lift-off and soot formation of biodiesel sprays[C]//Sae World Congress&Exhibition. New York:SAE Technical Papers,2010:10606
17 戴鹏,陈正,陈十一.正癸烷/甲苯扩散火焰的着火特性[J].工程热物理学报,2012,33(10):1815-1818Dai Peng,Chen Zheng,Chen Shiyi. Ignition properties of n-decane/toluene diffusion flames[J]. Journal of Engineering Thermophysics,2012,33(10):1815-1818
18 赵昌普,陈生齐,李艳丽,等.正庚烷燃烧详细化学动力学模型的简化及其有效性分析[J].内燃机学报,2008,26(4):346-352Zhao Changpu,Chen Shengqi,Li Yanli,et al. Reduction of a detailed chemical kinetics model of n-heptane combustion and its validity analysis[J]. Transactions of CSICE,2008,26(4):346-352
19 赵天朋,刘永峰,何旭,等.柴油在O2/CO2氛围下燃烧特性模拟和试验[J].内燃机学报,2017(5):415-422Zhao Tianpeng,Liu Yongfeng,He Xu,et al. Simulation and experiment of auto-ignition characteristics for diesel fuel in O2/CO2atmosphere[J]. Transactions of CSICE,2017(5):415-422
20 Seshadri K,Peters N,Paczko G. Rate-ratio asymptotic analysis of autoignition of n-heptane in laminar nonpremixed flows[J]. Combustion&Flame,2006,146(1):131-141
21 李步照,李博,李俊,等.柴油/乙醇燃料发动机缸内燃烧过程的数值模拟[J].农机化研究,2010,32(9):223-226Li Buzhao,Li Bo,Li Jun,et al. Numerical simulation of the combustion processes of diesel/ethanol engine[J]. Journal of Agricultural Mechanization Research,2010,32(9):223-226
22 常亚超,贾明,刘耀东,等.基于解耦法构建柴油表征燃料的骨架机理[J].工程热物理学报,2014,35(12):2521-2525Chang Yachao,Jia Ming,Liu Yaodong,et al. Development of a diesel surrogate skeletal mechanism with a decoupling methodolgy[J]. Journal of Engineering Thermophysics,2014,35(12):2521-2525
23 黄冠宇,陈嘉雯,何柳,等.基于HCCI发动机着火特性的柴油三组分表征燃料详细化学动力学模型[J].内燃机学报,2014(5):407-413Huang Guanyu,Chen Jiawen,He Liu,et al. Detailed kinetic modeling on a new three-component diesel surrogate[J]. Transactions of CSICE,2014(5):407-413
24 Patel Amar,Kong Song-Charng,Rolf D,et al. Development and validation of a reduced reaction mechanism for HCCI engine simulations[J]. Eica,2004,15(5):393-424
2 Liu Yongfeng,Xiang Qi,Li Zhijun,et al. Experiment and simulation investigation on the characteristics of diesel spray impingement based on droplet impact phenomenon[J]. Applied Sciences-Basel,2018,8(3):384
3 张剑波,朱炜青.闭式循环柴油机的模拟计算与试验研究[J].工程热物理学报,1988,9(1):19-21Zhang Jianbo,Zhu Weiqing. Simulating computation and experimental study of the closed-cycle diesel engine[J]. Journal of Engineering Thermophysics,1988,9(1):19-21
4 张煜盛,程德豪.闭式循环柴油机工作过程的模拟计算研究[J].华中理工大学学报,1994(9):66-70Zhang Yusheng,Cheng Dehao. A thermodynamic simulation model for the working process of closed-cycle diesel engines[J]. Journal of Huazhong University of Science and Technology,1994(9):66-70
5 裴普成,刘永峰.液氧固碳零排放内燃机:201010519636. 9[P].2012-12-26Pei Pucheng,Liu Yongfeng. Liquid oxygen-fixed carbon zero emission internal combustion engine:201010519636. 9[P]. 2012-12-26
6 Liu Yongfeng,Jia Xiaoshe,Pei Pucheng,et al. Simulation and experiment for oxygen-enriched combustion engine using liquid oxygen to solidify CO2[J]. Chinese Journal of Mechanical Engineering,2016,29(1):188-194
7 姚春德,刘增勇,孙家峰,等.进气加入CO2对直喷式柴油机燃烧的影响[J].工程热物理学报,2003(4):707-710Yao Chunde,Liu Zengyong,Sun Jiafeng,et al. Effect of CO2added in intake air on combustion process in diesel engine[J]. Journal of Engineering Thermophysics,2003(4):707-710
8 孙旭阳.柴油机燃烧火焰浮起长度的研究[D].洛阳:河南科技大学,2010Sun Xuyang. The study of flame lift-off length[D]. Luoyang:Henan University of Science and Technology,2010
9 赵昌普,陈生齐,孙强,等.直喷柴油机火焰浮起长度的数值模拟研究[J].工程热物理学报,2009,30(10):1791-1794Zhao Changpu,Chen Shengqi,Sun Qiang,et al. Numerical study of flame lift-off length in a diesel engine[J]. Journal of Engineering Thermophysics,2009,30(10):1791-1794
10 Ito T,Kitamura T,Ueda M,et al. Effects of flame lift-off and flame temperature on soot formation in oxygenated fuel sprays[C]//SAE2003 World Congress&Exhibition. New York:SAE Technical Papers,2003:10073
11 Taskiran O O,Ergeneman M. Effect of nozzle dimensions and fuel type on flame lift-off length[J]. Fuel,2014,115(1):833-840
12 陈汉玉,左承基,王作峰,等. O2/CO2环境下柴油机燃烧特性数值模拟[J].农业机械学报,2014,45(1):27-33Chen Hanyu,Zuo Chengji,Wang Zuofeng,et al. Numerical simulation on diesel engine combustion characteristics in O2/CO2environment[J]. Transactions of the Chinese Society of Agricultural Machinery,2014,45(1):27-33
13 王作峰,左承基,陈汉玉,等. ZS195柴油机无氮(O2/CO2)燃烧的排放特性[J].合肥工业大学学报(自然科学版),2013,36(3):257-260Wang Zuofeng,Zuo Chengji,Chen Hanyu,et al. Emission characteristics of ZS195 diesel engine under O2/CO2combustion condition[J]. Journal of Hefei University of Technology,2013,36(3):257-260
14 王对对,左承基,王作峰,等.无氮(O2/CO2)环境下柴油机燃烧规律的试验研究[J].合肥工业大学学报(自然科学版),2013,36(6):664-666Wang Duidui,Zuo Chengji,Wang Zuofeng,et al. Experimental research on the diesel combustion rules in the condition of no nitrogen(O2/CO2)[J]. Journal of Hefei University of Technology,2013,36(6):664-666
15 Siebers D L,Higgins B,Pickett L. Flame lift-off on direct-injection diesel fuel jets:oxygen concentration effects[C]//SAE 2002 World Congress&Exhibition. New York:SAE Technical Papers,2002:10890
16 Wu Y F,Huang R H,Liu Y,et al. Effect of ambient temperature on flame lift-off and soot formation of biodiesel sprays[C]//Sae World Congress&Exhibition. New York:SAE Technical Papers,2010:10606
17 戴鹏,陈正,陈十一.正癸烷/甲苯扩散火焰的着火特性[J].工程热物理学报,2012,33(10):1815-1818Dai Peng,Chen Zheng,Chen Shiyi. Ignition properties of n-decane/toluene diffusion flames[J]. Journal of Engineering Thermophysics,2012,33(10):1815-1818
18 赵昌普,陈生齐,李艳丽,等.正庚烷燃烧详细化学动力学模型的简化及其有效性分析[J].内燃机学报,2008,26(4):346-352Zhao Changpu,Chen Shengqi,Li Yanli,et al. Reduction of a detailed chemical kinetics model of n-heptane combustion and its validity analysis[J]. Transactions of CSICE,2008,26(4):346-352
19 赵天朋,刘永峰,何旭,等.柴油在O2/CO2氛围下燃烧特性模拟和试验[J].内燃机学报,2017(5):415-422Zhao Tianpeng,Liu Yongfeng,He Xu,et al. Simulation and experiment of auto-ignition characteristics for diesel fuel in O2/CO2atmosphere[J]. Transactions of CSICE,2017(5):415-422
20 Seshadri K,Peters N,Paczko G. Rate-ratio asymptotic analysis of autoignition of n-heptane in laminar nonpremixed flows[J]. Combustion&Flame,2006,146(1):131-141
21 李步照,李博,李俊,等.柴油/乙醇燃料发动机缸内燃烧过程的数值模拟[J].农机化研究,2010,32(9):223-226Li Buzhao,Li Bo,Li Jun,et al. Numerical simulation of the combustion processes of diesel/ethanol engine[J]. Journal of Agricultural Mechanization Research,2010,32(9):223-226
22 常亚超,贾明,刘耀东,等.基于解耦法构建柴油表征燃料的骨架机理[J].工程热物理学报,2014,35(12):2521-2525Chang Yachao,Jia Ming,Liu Yaodong,et al. Development of a diesel surrogate skeletal mechanism with a decoupling methodolgy[J]. Journal of Engineering Thermophysics,2014,35(12):2521-2525
23 黄冠宇,陈嘉雯,何柳,等.基于HCCI发动机着火特性的柴油三组分表征燃料详细化学动力学模型[J].内燃机学报,2014(5):407-413Huang Guanyu,Chen Jiawen,He Liu,et al. Detailed kinetic modeling on a new three-component diesel surrogate[J]. Transactions of CSICE,2014(5):407-413
24 Patel Amar,Kong Song-Charng,Rolf D,et al. Development and validation of a reduced reaction mechanism for HCCI engine simulations[J]. Eica,2004,15(5):393-424