| 黄钰,葛蕴珊,王永军,魏丕勇,刘小平,孟云霞.涡轮增压直喷汽油机缸内流场、混合气形成和燃烧数值模拟及试验[J].内燃机工程,2017,38(4):7-10. |
| Numerical Simulation and Experiment of the Flow Field, Mixture Formation and Combustion Process in the Cylinder of a Turbocharged Direct Injection Gasoline Engine |
| DOI： |
| Key Words:IC engine gasoline direct injection（GDI） flow field spray numerical simulation |
| Author Name | Affiliation | | HUANG Yu,GE Yunshan,WANG Yongjun,WEI Piyong,LIU Xiaoping,MENG Yunxia | 1.Post-Doctoral Scientific Research Station,Beijing Automobile Group Co.,Ltd.，Beijing 102206,China
2.Beijing Institute of Technology,Beijing 100081,China |
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| Abstract:Using the 3D engine model a tumble control valve was installed in the intake port to provide a means for controlling the engine airflow motion. Based on a CFD software, the evolution and development of the cylinder flow field with the change of crank angle were calculated, the tumble motion and turbulent kinetic energy were assessed, the spray atomization process and mixture concentration distribution were simulated under the condition of equivalent air/fuel ratio, and the combustion process was analyzed. Results show that use of tumble control valve can effectively improve the cylinder tumble ratio, and enhance the turbulent kinetic energy, allowing to improve the combustion rate and combustion process at the condition of 0.2MPa at 2000r/min and full load at 1750r/min. Moreover, a special design of piston top shape was used to prevent the spray wall impingements. These improvements make the simulated cylinder combustion pressure curves and the actual engine bench test results have a good consistency. |
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