燃烧模拟在国六柴油机燃烧系统开发中的应用

李军成; 李明星; 曾丽丽; 张志雄

doi:10.3969/j.issn.1001-2222.2021.01.007

车用发动机 >

2021 , Vol. 0 >Issue 1: 40

DOI: https://doi.org/10.3969/j.issn.1001-2222.2021.01.007

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燃烧模拟在国六柴油机燃烧系统开发中的应用

李军成 ,
李明星 ,
曾丽丽 ,
张志雄

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（广西玉柴机器股份有限公司工程研究院，广西南宁 530007）

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Application of Combustion Simulation to Combustion System Development of China Ⅵ Diesel Engine

LI Juncheng ,
LI Mingxing ,
ZENG Lili ,
ZHANG Zhixiong

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(Engineering R&D Institute of Guangxi Yuchai Machinery Co.,Ltd.,Nanning 530007,China)

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摘要

在某国六柴油机燃烧系统开发中，基于数值模拟指导燃烧室与喷油器优化匹配，3个燃烧室分别与4种喷油器匹配。燃烧模拟研究表明：随着油嘴凸高增大炭烟排放显著改善，指示燃油消耗率也降低，但不同工况的最佳油嘴凸高不同；流量为900 mL/min的喷油器综合性能优于流量为860 mL/min的喷油器；各燃烧室均有与之匹配较优的喷油器。对3种优选方案进行试验验证，结果表明：计算预测的油嘴凸高和喷油器流量对油耗、炭烟的影响与试验趋势吻合，燃烧室形状的影响与试验趋势基本吻合。

关键词： 柴油机; 燃烧系统; 燃烧室; 喷油器; 数值模拟

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李军成 , 李明星 , 曾丽丽 , 张志雄 . 燃烧模拟在国六柴油机燃烧系统开发中的应用[J]. 车用发动机, 2021 , 0(1) : 40 . DOI: 10.3969/j.issn.1001-2222.2021.01.007

Abstract

During the development process of combustion system for a China Ⅵ diesel engine, the optimal matching of combustion chamber with injector was studied based on the numerical simulation. Three combustion chambers were individually matched with four injectors. The simulation results show that the soot emission and ISFC reduce significantly with the increase of tip protrusion, but the optimal tip protrusions are different under different conditions. The comprehensive performance of 900 mL/min injector is better than that of 860 mL/min injector. Each combustion chamber has an optimal matching injector. According to the verification results of the three matching schemes, the effects of tip protrusion and injector flow rate on fuel consumption and soot emission are similar between the calculation and test and the influence of chamber shape also coincides with the measurement.

Key words： diesel engine; combustion system; combustion chamber; injector; numerical simulation

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