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| 某型中速柴油机降低NOx生成与排放的改进研究 |
| 董日京1,董克雷1,刘德建1,包东明1,梁桂华2,陆松华1 |
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| 1.江苏镇江中船设备有限公司,江苏镇江,212011;2.大连理工大学,辽宁大连,116024 |
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| 摘要:在测试与数值模拟的基础上,对某型中速柴油机提出改进方案,并进行了改进方案下的燃烧排放测试和缸内燃烧、排放过程的数值模拟,得到了缸内温度、压力以及NOx生成与排放量的变化过程.研究表明:改进方案的计算结果和台架试验结果较好吻合;对该机型实施的适当推迟喷油提前角,缩短喷油持续期的改进方案,可使NOx排放修正值由改进前的11.30 g/(kW·h)降低到9.59 g/(kW·h),达到了IMO Tier II NOx排放法规规定的小于9.69 g/(kW·h)的标准. |
| 关键词: 中速柴油机, NOx, 喷油正时, 数值模拟, 排放试验 |
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| Improvement Study on Reducing the NOx Formation and Emission of a Medium Speed Diesel Engineof a Medium Speed Diesel Engine |
| Dong Rijing1,Dong Kelei1,Liu Dejian1,Bao Dongming1,Liang Guihua2,Lu Songhua1 |
| 1.Zhenjiang CME Co．，Ltd．，JiangsuZhenjiang 212011;2.Dalian University of Technology，LiaoningDalian 116024 |
| Abstract:Based on tests and numerical simulation，improvement programme of a medium speed diesel casine
W8$put forward．And the combustion emissions tests as well as numerical simulation of in-cylinder cornbusfion
and combustion process were carried out，obtaining the change process of in-cyhnder temperature，
pressure，NO。formation and emissiom data．Research shows that the calculation results coincide well with the
experimental results Oil test bed．And through postponing the fuel injection timing and reducing the fuel injection
duration properly，the NO,emission modified value was reduced from 11．30 g/(kW·h)to 9．59 g/(kW·h)，
which Was less than 9．69 g/(kW·h)and met with the standard of IMO Tier II NO。emission rule． |
| Key words: medium speed diesel engine NO。 fuel injection timing numerical simulation emission test |