| 摘要:以L23/30A发动机为研究对象,研究了不同进气参数及不同燃烧室几何形状对缸内燃烧特性对柴油机性能及排放的影响。研究结果表明:随着进气压力的增大和燃烧室过渡圆深度的加深,缸内挤流作用加强,油气混合均匀,缸内燃烧充分,降低了soot及NOx的生成；减小燃烧室的缩口直径及提高进气温度,缸内湍流分层严重,滞缓了缸内涡团的破碎与聚合,局部油气分布过浓燃烧不完全,导致局部温度、压力过高,诱发燃烧过程中soot及NOx的生成。因此,在加深燃烧室过渡圆深度的前提下,通过提高低温燃烧的进气压力,可以改善发动机的燃烧特性。 |
| 关键词: LNG发动机 排放性能 进气参数 燃烧室结构 |
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| Effect of Intake Parameters and CombustionChamber Structure on Emission of LNG Engine |
| Yang Xingling,Zhang Jing,Ren Pengju,Zhou Wangcun |
| Jiangsu University of Science and Technology, Jiangsu Zhenjiang 212003;North Toward Duty Truck Group, Neimenggu Baotou 014000 |
| Abstract:Taken L23/30A engine as the research object, different inlet parameters and combustion chamber structure was studied in order to investigate the influence on combustion process and emission characteristics. Results show that:the increase of inlet pressure and the depth of circle diameter of combustion chamber are conducive to enhancing squeeze flow in cylinder and improving the mixing uniformity of oil and gas, and achieving complete combustion; it could also reduce soot and NOx emissions; decrease of the diameter of combustion chamber and rise of inlet temperatures leads to severe layer stratification of turbulence and delays the break-up and polymerization of eddy mass in cylinder , partial oil and gas over-rich distribution and incomplete combustion causes excess local temperature and pressure, induces the generation of soot and NOx in combustion process. Therefore, on the premise of deepening the circle diameter of combustion chamber, by increasing the inlet pressure of low-temperature combustion can improve the combustion performance diesels. |
| Key words: LNG engine emission performance inlet parameters combustion chamber structure〖FL |
