内燃机工程2026，Vol.47Issue(4)：71-79,9.DOI:10.13949/j.cnki.nrjgc.2026.04.008
对置二冲程柴油机双卷流燃烧系统内室构型对燃烧特性的影响
Effects of Inner Chamber Configuration of an Opposed-Piston Two-Stroke Diesel Engine with a Double-Swirl Combustion System on Combustion Characteristics
石智成 1张永全 1吴晗 1张露 1张泽宇 1赵伟华 1李向荣1
作者信息
- 1. 北京理工大学 机械与车辆学院,北京 100081
- 折叠
摘要
Abstract
To address the issues of uneven fuel spatial distribution and low air utilization in side-mounted fuel injection systems on opposed-piston two-stroke(OP2S)diesel engines,the influence of the double-swirl inner chamber configuration parameters on combustion heat release was investigated using CONVERGE software.The results show that the chamber configuration significantly affects the momentum distribution and velocity field of the fuel jet after wall impingement,thereby altering the fuel spatial distribution and mixture quality.The differences in combustion are primarily reflected in the afterburning stage.With a smaller inner chamber inclination angle(27.8°),the velocity field covers a smaller area,and the fuel rotates within the inner chamber pit.With a larger inclination angle(50.0°),significant momentum loss occurs,and the fuel jet tends to move toward the outer chamber.An appropriate inclination angle(32.5°)can induce a high-speed and widely distributed velocity field,which transports the fuel to the root of the inner chamber,improves air utilization,and reduces locally over-rich mixtures.As the inner chamber inclination angle increased from 27.8° to 32.5°,the mass proportion of fuel within the suitable range for combustion increased from 33.5％to 34.6％,the combustion duration shortened from 28.84° to 24.67°,and the indicated thermal efficiency improved from 49.55％to 51.84％.However,further increasing the angle to 50.0° led to a decline in combustion and power output performance.关键词
对置二冲程柴油机/双卷流燃烧室/内室倾角/喷雾发展/油气混合/燃烧特性Key words
opposed-piston two-stroke diesel engine/double-swirl combustion chamber/angle of the inner chamber/spray development/fuel-air mixing/combustion characteristic分类
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石智成,张永全,吴晗,张露,张泽宇,赵伟华,李向荣..对置二冲程柴油机双卷流燃烧系统内室构型对燃烧特性的影响[J].内燃机工程,2026,47(4):71-79,9.
