由于生物柴油可再生、无毒、可降解、可持续等优点，生物柴油受到了越来越多的关注。为了分析生物柴油燃烧特性和喷油策略对柴油机燃烧和排放特性的影响，本文建立三维CFD仿真模型，并采用ChemkinⅡ代码与三维AVL-Fire相耦合的方法进行计算。计算的机理主要考虑了生物柴油饱和度的69种产物和204种化学反应，并利用验证后的仿真模型研究了2种工况下3种不同喷油策略对柴油机功率、缸压、放热率、CO和NOx排放的影响。
Due to the advantages of renewable, non-toxic, degradable and sustainable, biodiesel has attracted more and more experts' attention. In order to analyze the influence of the characteristics of biodiesel and the injection strategy on the combustion and emission characteristics of diesel engine, a three-dimensional CFD simulation model is established in this paper, and the calculation is carried out by the coupling method of the CHEMKIN II code and the three-dimensional AVL fire. The calculation mechanism mainly considers 69 products and 204 chemical reactions of biodiesel saturation, and studies the influence of three different fuel injection strategies on diesel engine power, cylinder pressure, heat release rate, CO and NOx emissions under two conditions by using the verified simulation model.
2020,42(8): 145-151 收稿日期：2019-10-23
DOI：10.3404/j.issn.1672-7649.2020.08.027
分类号：U664
基金项目：广西自然科学基金面上项目(2018GXNSFAA281267)；广西自然科学基金联合培育项目(2018GXNSFAA294072)
作者简介：于世永(1980-),男,硕士,讲师,研究方向为现代轮机管理
参考文献：
[1] 王存磊, 殷承良, 王磊. BOOST发动机建模及其在混合动力仿真中的应用[J]. 上海交通大学学报, 2011, 45(6): 875-879
[2] 朱益梁, 何勇灵. 可变压缩比对增压中冷柴油机性能影响的模拟分析[J]. 农业工程学报, 2012, 28(4): 27-32
[3] LUO ZY, PLOMER M, LU TF, SOM S,et al. A reduced mechanism for biodiesel surrogates for compression ignition engine appli-cations[J]. Fuel, 2012, 99: 143-153
[4] BIRTAS A, CHIRIAC R. A study of injection timing for a diesel engine operating with gasoil and HRG gas[J]. UPB Scientific Bulletin, Bucharest, 2011
[5] ZHANG ZQ, E JQ, DENG YW, etal. Effect of fatty acid methyl esters proportion on combustion and emission characteristics of a biodiesel fueled marine diesel engine[J]. Energy Conversion and Management, 2018, 159: 244-253
[6] FISHER EM, PITZ WJ, CURRAN HJ, etal. Detailed chemical kinetic mechanisms for combustion of oxygenated fuels[J]. Proceeding of the Combustion Institute, 2000, 28: 1579-1586
[7] BRAKORA JL, R RD. Investigation of NOx predictions from biodiesel-fueled HCCI engine simulations using a reduced kinetic mechanism[J]. SAE paper, 2010-01-0577
[8] NG HK, GAN SY, NG JH,etal. Development and validation of a reduced combined biodiesel-diesel reaction mechanism[J]. Fuel, 2013, 104: 620-634
[9] SCHWAB AW, BAGBY MO, FREEMAN B. Preparation and properties of diesel fuels from vegetable oils[J]. Fuel, 1987, 66(10): 1372-1378
[10] KUMAR MS, BELLETTRE J, TAZEROUT M. Investigations on a CI engine using animal fat and its emulsions with water and methanol as fuel[J]SAE Technical Paper, 2005-01-1729.
[11] ZHOU DZ, YANG WM, AN H, etal. A numerical study on RCCI engine fueled by biodiesel/methanol[J]. Energy Conversion and Management, 2015, 89: 798-807
