不同热值生物燃料燃烧特性数值模拟

周莉; 夏姣辉

doi:10.13224/j.cnki.jasp.2014.10.010

不同热值生物燃料燃烧特性数值模拟

doi: 10.13224/j.cnki.jasp.2014.10.010

周莉,
夏姣辉

西北工业大学动力与能源学院, 西安 710072

基金项目:

国家自然科学基金（51236006，51176156）；陕西省自然科学基金（2013JQ7004）

详细信息

作者简介:
周莉（1978- ），女，河南信阳人，教授，博士，主要从事发动机内流气动热力学研究.

中图分类号: V313
计量
- 文章访问数: 1162
- HTML浏览量: 3
- PDF量: 1073
- 被引次数: 0
出版历程
- 收稿日期: 2013-06-17
- 刊出日期: 2014-10-28

Numerical simulation on combustion characteristics of biofuels with different calorific values

School of Power and Energy, Northwestern Polytechnical University, Xi'an 710072, China

摘要

摘要: 采用标准k-ε湍流模型、涡耗散湍流燃烧模型、P-1辐射传热模型对二维简化燃烧室燃料甲烷气、沼气、生物质气的燃烧特性进行了数值模拟.通过比较不同截面的燃烧情况，分析燃烧室内的温度分布、NOx质量分数分布、流场结构，研究了不同热值燃料的燃烧特性.结果表明：在入口空气、燃料质量流量相同的条件下，随着燃料热值降低，燃烧温度降低，温度分布更均匀，NOx排放量减少，流动速度降低；适当调节余气系数，能改善燃烧效果，温度分布仍满足高热值燃料燃烧温度高于低热值燃料燃烧温度的规律；在生物燃料混合气中掺入不同热值的可燃成分，可改变混合气的热值，恰当的混合比例能更好地发挥生物燃料的作用.
- 燃烧特性 /
- 生物质气 /
- 热值 /
- 余气系数 /
- 生物燃料
Abstract: Combustion characteristics of the two-dimensional simplified combustor were simulated numerically for methane, marsh gas and biomass gas, with introduction of standard k-ε turbulence model, eddy-dispassion turbulence combustion model and P-1 radiation heat transfer model. The temperature distribution, NOx mass fraction distribution, flow field structure in the combustor were analyzed to obtain the combustion characteristics of fuels with different calorific values by comparing the combustion situations of different cross sections. Results show that, under the condition of same mass flow of inlet air and fuel, the combustion temperature decreases with the decline of calorific value of fuels, the temperature distribution is more uniform, the NOx emissions are diminished, and the flow velocity is reduced; the proper regulation of excess air coefficient can improve the effect of combustion burning, and the temperature distribution still meets the law that combustion temperature of fuels with high calorific value is higher than that of fuels with low calorific value; the mixing of combustible components with different calorific values in biofuels syngas will change the calorific value of syngas, and the appropriate mixing ratio can play a better role for biofuels.
- combustion characteristics /
- biomass gas /
- calorific value /
- excess air coefficient /
- biofuels

HTML

参考文献(16)

[1]	Franco A,Giannini N.Perspectives for the use of biomass as fuel in combined cycle power plants[J].International Journal of Thermal Sciences,2005,44(2):163-177.
[2]	Yamasaki Y,Okada Y,Iijima K.Operation of micro gas turbine system employing two stage combustion of biomass gas[R].ASME Paper GT-2009-59900,2009.
[3]	赵晓燕,李祥晟,丰镇平.燃气轮机低热值合成气燃烧室内三维湍流流动的数值模拟研究[J].动力工程,2009,29(4):330-334. ZHAO Xiaoyan,LI Xiangsheng,FENG Zhenping.Numerical simulation research on three dimensional turbulence flow in a gas turbine combustor buring low heat value syngas[J].Journal of Power Engineering,2009,29(4):330-334.(in Chinese)
[4]	王朝晖,王成军,王丹丹,等.燃气轮机燃烧室燃烧气体燃料的数值模拟[J].沈阳航空工业学院学报,2010,27(2):11-14. WANG Zhaohui,WANG Chengjun,WANG Dandan,et al.Combusting gas fuel simulation for the combustor of gas turbine engine[J].Journal of Shenyang Institute of Aeronautical Engineering,2010,27(2):11-14.(in Chinese)
[5]	Francesco F,Paolo L,Michele B,et al.CFD simulation of a microturbine annular combustion chamber fueled with methane and biomass pyrolysis syngas:preliminary results[R].ASME Paper GT-2009-60030,2009.
[6]	Francesco F,Paolo L,Gianni B.CFD simulation of biomass pyrolysis syngas vs.natural gas in a microturbine annular combustor[R].ASME Paper GT-2010-23473,2010.
[7]	Sadamasa A,Atushi I,Shigeru H,et al.Emissions in combustion of lean methane-air and biomass-air mixtures supported by primary hot burned gas in a multi-stage gas turbine combustor[J].Proceedings of the Combustion Institute,2007,31(2):3131-3138.
[8]	Pascale D A,Marco F,Antonio P.Numerical simulation of biomass derived syngas combustion in a swirl flame combustor[R].ASME Paper GT-2010-22791,2010.
[9]	张顺利.燃气轮机燃烧室燃烧流场的数值模拟[D].哈尔滨:哈尔滨工程大学,2005. ZHANG Shunli.Numerical investigation of the flowfield of the combustor in the turbine engine[D].Harbin:Harbin Engineering University,2005.(in Chinese)
[10]	冯显钦,车志,梁瑞香.简析空燃比对汽车发动机性能的影响[J].科技致富向导,2013(5):82. FENG Xianqin,CHE Zhi,LIANG Ruixiang.Simple analysis on the effect of air-fuel ratio on the performance of the car engine[J].Guide of Sci-tech Magazine,2013(5):82.(in Chinese)
[11]	张巍.生物质气微型燃气轮机的特性研究[D].上海:上海交通大学,2009. ZHANG Wei.Characteristics study on micro gas turbine system for gasfield biomass fuel[D].Shanghai:Shanghai Jiao Tong University,2009.(in Chinese)
[12]	周明,沈颖刚,黄金凤.高原环境下不同配比生物柴油混合燃料排放特性的研究[J].拖拉机与农用运输车,2011,38(1):59-63. ZHOU Ming,SHEN Yinggang,HUANG Jinfeng.Emission characteristics on biodiesel blends of different ratios under plateau environment[J].Tractor and Farm Transporter,2011,38(1):59-63.(in Chinese)
[13]	张天顺,张汝坤,玄伟东,等.柴油机燃用桐油生物柴油的排放性能试验研究[J].农机化研究,2011(2):177-180. ZHANG Tianshun,ZHANG Rukun,XUAN Weidong,et al.Experimental study on the emission characteristics of diesel engine fueled with bio-diesel prepared from tong oil[J].Agricultural Mechanization Research,2011(2):177-180.(in Chinese)
[14]	仲兆平,姜小祥,Naoko E.生物油/生物柴油混合燃料的热稳定性[J].东南大学学报,2011,41(1):129-133. ZHONG Zhaoping,JIANG Xiaoxiang,Naoko E.Thermal stability of bio-oil/bio-diesel mixture[J].Journal of Southeast University,2011,41(1):129-133.(in Chinese)
[15]	Pantankar S V.Numerical heat transfer and fluid flow[M].New York:Hemisphere Publishing Company,1980.
[16]	张振奎,钟华贵.多点喷射模型燃烧室性能CFD分析[J].航空发动机,2010,36(4):16-21. ZHANG Zhenkui,ZHONG Huagui.CFD analysis of performance for the model multipoint injection combustor[J].Aeroengine,2010,36(4):16-21.(in Chinese)