螺旋/切向气道相异气门稳流试验与燃烧分析  

Steady Flow Test and Combustion Analysis of Different Spiral/Tangential Air-Passage Valves

作　　者：张韦[1] 王应肖 彭益源 陈朝辉[1] 蒋倩昱 Zhang Wei;Wang Yingxiao;Peng Yiyuan;Chen Zhaohui;Jiang Qianyu(Kunming University of Science and Technology,Yunnan Key Laboratory of Internal Combustion Engine,Kunming 650500;Yunnei Power Co.,Ltd.,Kunming 650224)

机构地区：[1]昆明理工大学,云南省内燃机重点实验室,昆明650500 [2]云内动力股份有限公司,昆明650224

出　　处：《汽车工程》2020年第11期1537-1544,共8页Automotive Engineering

基　　金：国家自然科学基金(51665023,51666007)资助。

摘　　要：利用气道稳流试验台,结合CFD模拟,对D19四气门、双进气道发动机进行相异气门稳流试验与燃烧分析。结果显示:相同气门最大开度,双气道间气流严重干涉,限制了涡流比和流量系数的提升;围绕气门最大开度设计的相异气门可充分利用缸内空间,使缸内气流形成相互交错的流动,避免气道间气流的严重干涉,实现流量系数与涡流比的提升,进气量的增加可使大部分燃油与空气进行更充分的混合,涡流比的提升使油气混合更加均匀,燃烧更充分,缸内放热量增加,Soot和CO大幅减少,NOx略有增加。Steady-flow test and combustion analysis of the D19 four-valve and dual-intake-port engines are carried out using the steady-flow test bench and CFD simulation.The results show that with the same valve under the maximum opening there is severe interference of airflow between the two air passages,which limits the increase of the vortex ratio and the flow coefficient;while the different valves designed for the maximum opening of the valve can make full use of the space in the cylinder and make the airflow in the cylinder form mutual staggered flow to avoid serious interference of airflow between the airways so as to increase the flow coefficient and vortex ratio.The increase of the air intake can make most of the fuel and air more fully mixed.The increase of the vortex ratio makes the fuel and gas mixture more uniform and the combustion is more sufficient.As a result,the cylinder heat release is increased,with Soot and CO greatly reduced and NOx slightly increased.

关 键 词：螺旋气道 切向气道 相异气门 稳流试验 燃烧分析 

分 类 号：TK4[动力工程及工程热物理—动力机械及工程]