江 冰,武昭晖,何云堂.CNG发动机燃烧室形状对气流运动和燃烧特性的影响[J].农业机械学报,2015,46(1):338-344.
Jiang Bing,Wu Zhaohui,He Yuntang.Effect of Combustion Chamber’s Shape of CNG Engine on Air Flow and Combustion Characteristic[J].Transactions of the Chinese Society for Agricultural Machinery,2015,46(1):338-344.
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CNG发动机燃烧室形状对气流运动和燃烧特性的影响   [下载全文]
Effect of Combustion Chamber’s Shape of CNG Engine on Air Flow and Combustion Characteristic   [Download Pdf][in English]
投稿时间:2014-03-06  
DOI:10.6041/j.issn.1000-1298.2015.01.047
中文关键词:  天然气发动机 燃烧室 气流运动 燃烧
基金项目:山西省科技攻关资助项目(20130322002)
作者单位
江 冰 太原大学 
武昭晖 太原大学 
何云堂 中国汽车技术研究中心 
中文摘要:为提高天然气发动机的燃烧品质,基于6105型涡轮增压CNG发动机,通过建模分析法,对发动机不同燃烧室形状对缸内气流运动和燃烧特性的影响进行了三维数值模拟研究。研究结果表明,燃烧室形状对挤流的形成和燃烧过程有着重要影响。缩口型燃烧室具有较大的挤流强度和较长的涡流持续期,火焰传播速度快,燃烧性能好,但其火花塞附近的热负荷较大,NOx的含量高。敞口型燃烧室挤流强度较弱,火焰传播速度较慢,燃烧性能最差。直口型燃烧室则介于两者之间,既能保证较快的火焰传播速度和较好的燃烧性能,又降低了其火花塞附近的热负荷和NOx的排放量,是较适合天然气发动机采用的燃烧室。
Jiang Bing  Wu Zhaohui  He Yuntang
Taiyuan University,Taiyuan University and China Automotive Technology and Research Center
Key Words:CNG engine Combustion chamber Air flow Combustion
Abstract:In order to improve character of combustion of CNG engine, basing on type 6105 turbine charge CNG engine, the air flow in the cylinder and its combustion characteristic affected by different combustion chamber’s shape were simulated numerically. The result shows that the shape of combustion chamber plays an important role in the squish formation and combustion process. The contracted cave type combustion shape (chamber C) had much stronger squish and longer term period lasting compared with the others. The flame propagation velocity could be increased and the best combustion performance could be got. But the thermal load near igniter plug and the mass fraction of NOx produced during combustion in chamber C was higher. On the contrary, open cave type combustion (chamber B) had much weaker squish and slower flame propagation velocity. The worst combustion performance would be got. The situation of air flow in the cylinder and its combustion performance of vertical cave type combustion shape (chamber A) was between chamber C’s and chamber B’s. The suitable flame propagation velocity and good combustion performance could be got. And the thermal load near igniter plug and the mass fraction of NOx produced during combustion could be reduced. It was a suitable combustion chamber for CNG engine.

Transactions of the Chinese Society for Agriculture Machinery (CSAM), in charged of China Association for Science and Technology (CAST), sponsored by CSAM and Chinese Academy of Agricultural Mechanization Science(CAAMS), started publication in 1957. It is the earliest interdisciplinary journal in Chinese which combines agricultural and engineering. It always closely grasps the development direction of agriculture engineering disciplines and the published papers represent the highest academic level of agriculture engineering in China. Currently, nearly 8,000 papers have been already published. There are around 3,000 papers contributed to the journal each year, but only around 600 of them will be accepted. Transactions of CSAM focuses on a wide range of agricultural machinery, irrigation, electronics, robotics, agro-products engineering, biological energy, agricultural structures and environment and more. Subjects in Transactions of the CSAM have been embodied by many internationally well-known index systems, such as: EI Compendex, CA, CSA, etc.

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