| 摘要:基于快速混合燃烧技术，用试验和数值模拟的方法对某型柴油机的燃烧系统进行了优化。在转速为1 800 r/min的全负荷工况下的研究结果表明：浅ω燃烧室匹配多孔喷油嘴，高压过程指示功比原机高7.65%，NOx和碳烟排放分别比原机增加约10%和降低约80 %；碰撞分流燃烧室匹配传统多孔喷油嘴，高压过程指示功比原机高7.04%，NOx和碳烟排放分别比原机降低约10%与60%；浅ω燃烧室匹配交叉孔型高扰动喷油嘴，高压过程指示功比多孔喷油嘴的高0.43%，能够进一步提高燃油经济性。 |
| 关键词: 燃烧室 高扰动喷嘴 燃烧 排放 |
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| Influence of Optimized Matching of Combustion Chamber and Nozzle on Combustion and Emission Characteristics of Diesel Engine |
| YANG Yong,WANG Bin,DONG Dongsheng,JIA Demin,WANG Xiaoyan,TIAN Hua |
| School of Energy and Power Engineering, Dalian University of Technology, Dalian 116023, China;Weichai Power Co., Ltd., Weifang 261061, China |
| Abstract:Based on rapid mixed combustion technology，the combustion system of a diesel engine was optimized by the methods of experiment and numerical simulation.Under the full load condition with the rotating speed of 1 800 r/min the research results showed that ：When the shallow ω combustion chamber was equipped with multi hole fuel injection nozzle，the indicated work of high-pressure process was 7.65% higher than that of the original engine，and the NOx and soot emissions were increased by about 10% and reduced by about 80% respectively；When the collision disperse chamber was equipped with multi hole fuel injection nozzle，the indicated work of high-pressure process was 7.04% higher than that of the original engine，and the NOx and soot emissions were increased by about 10% and reduced by about 60% respectively；When shallow ω combustion chamber was equipped with cross hole high disturbance fuel injection nozzle，and the indicated work of high-pressure process was 0.43% higher than that of multi hole fuel injection nozzle， which can further improve fuel economy. |
| Key words: combustion chamber high disturbance nozzle combustion emission |
