喷射压力对内燃机中汽油燃爆特性的影响

李润; 程扬帆; 张蓓蓓; 李世周; 李梦

doi:10.11858/gywlxb.20240857

喷射压力对内燃机中汽油燃爆特性的影响

doi: 10.11858/gywlxb.20240857

李润^1,,
程扬帆^{1, 2,*, ,},
张蓓蓓²,
李世周¹,
李梦¹

1.
安徽理工大学安全科学与工程学院, 安徽淮南　232001
2.
安徽理工大学土木建筑学院, 安徽淮南　232001

基金项目: 国家自然科学基金（12272001）；安徽省高校自然科学基金杰青项目（2023AH020026）

详细信息

作者简介:
李　润（2000－），男，硕士研究生，主要从事爆炸安全与防护研究. E-mail：1989657216@qq.com

通讯作者:
程扬帆（1987－），男，博士，教授，博士生导师，主要从事爆炸力学和爆炸安全研究. E-mail：cyf518@mail.ustc.edu.cn

中图分类号: O389; O521.9
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- 文章访问数: 43
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- PDF下载量: 6
出版历程
- 收稿日期: 2024-07-17
- 修回日期: 2024-08-11
- 录用日期: 2024-10-18
- 网络出版日期: 2024-12-09

Effect of Injection Pressure on Gasoline Deflagration Characteristics in Internal Combustion Engine

LI Run^1
,,
CHENG Yangfan^{1, 2,*
, ,},
ZHANG Beibei²,
LI Shizhou¹,
LI Meng¹

1.
School of Safety Science and Engineering, Anhui University of Science and Technology, Huainan 232001, Anhui, China
2.
School of Civil Engineering and Architecture, Anhui University of Science and Technology, Huainan 232001, Anhui, China

摘要

摘要: 为了探究不同喷射压力对受限空间内汽油的燃爆特性的影响，运用20 L球形爆炸测试装置，对不同喷射压力下汽油云雾燃爆的特征参数变化、火焰传播、温度变化进行了测试。结果表明：最佳喷料时间为100 ms，最大燃爆压力和最大燃爆压力上升速率随喷射压力的增加呈线性上升趋势，燃爆持续时间则呈线性下降趋势。喷射压力的变化对燃爆持续时间的影响更为显著，汽油的燃爆效率随着喷射压力的增加而显著提高。基于比色测温方法对火焰温度场进行重构，发现最高平均温度与喷射压力呈线性关系，最高平均温度随喷射压力的增加而升高。通过火焰传播过程中云雾形态和火焰温度的变化情况，就喷射压力对汽油云雾燃爆的影响进行了分析。研究结果可为增压直喷式内燃机的设计以及汽油内燃机燃烧效率和经济性的提升提供理论参考。
- 汽油内燃机 /
- 喷射压力 /
- 燃爆特性 /
- 蒸发速率
Abstract: In order to explore the influence of injection pressure on the deflagration characteristics of gasoline in the confined space, a 20 L spherical explosion test device was used to examine the changes of characteristic parameters, i.e., the transient flame propagation and temperature of gasoline mist deflagration under different injection pressures. The results showed that the optimum spraying time was 100 ms, and the maximum explosion pressure and maximum explosion pressure rise rate increased linearly with the increase of injection pressure, while explosion duration decreased linearly. The change of injection pressure had a more significant effect on explosion duration, and the combustion efficiency of gasoline increased significantly with the increase of injection pressure. Based on the colorimetric temperature measurement method, the flame temperature field was reconstructed. It was found that the maximum average temperature had a linear relationship with injection pressure, and the maximum average temperature increased with injection pressure. The influence of injection pressure on the deflagration characteristics of gasoline mist was analyzed through the changes of mist morphology and flame temperature during flame propagation. The outcome of this research can provide theoretical reference for the design of turbocharged direct injection internal combustion engine and the improvement of combustion efficiency and economy of gasoline internal combustion engine.
- gasoline internal combustion engine /
- injection pressure /
- deflagration characteristics /
- evaporation rate

HTML全文

图 1 20 L球形测试装置示意图

Figure 1. Schematic diagram of 20 L spherical test device

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图 2 比色测温标定

Figure 2. Calibration for colorimetric temperature measurement

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图 3 喷料时间对p_max、(dp/dt)_max和t_d的影响

Figure 3. Influence of fuel spray time on p_max, (dp/dt) _max and t_d

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图 4 喷射压力对p_max、(dp/dt)_max和t_d的影响

Figure 4. Influence of injection pressure on p_max, (dp/dt) _max and t_d

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图 5 不同喷射压力下汽油爆炸的火焰传播过程

Figure 5. Flame propagation process of gasoline explosion under different injection pressures

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图 6 不同喷射压力下汽油爆炸的火焰温度场

Figure 6. Flame temperature field of gasoline explosion under different injection pressures

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图 7 不同喷射压力下火焰传播过程中温度的演化曲线

Figure 7. Temperature evolution curves of flame propagation under different injection pressures

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