喷油嘴喷孔结构参数对甲醇燃料喷射流场影响的数值模拟

王鹏里; 董志国; 轧刚; 段泽斌

doi:10.13433/j.cnki.1003-8728.2018.0701

喷油嘴喷孔结构参数对甲醇燃料喷射流场影响的数值模拟

doi: 10.13433/j.cnki.1003-8728.2018.0701

王鹏里^1,2,
董志国^1,2, ,,
轧刚^1,2,
段泽斌^1,2

1.
太原理工大学机械工程学院, 太原 030024;
2.
精密加工山西省重点实验室, 太原 030024

基金项目:

国家自然科学基金项目（51575375）资助

详细信息

作者简介:
王鹏里(1991-),硕士研究生,研究方向为甲醇发动机喷油嘴雾化效果的研究,523315029@qq.com

通讯作者:
董志国,副教授,博士,dong_zhiguo@126.com

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- 文章访问数: 235
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- PDF下载量: 13
- 被引次数: 0
出版历程
- 收稿日期: 2017-07-09
- 刊出日期: 2018-07-05

Effect of Nozzle Nozzle Structural Parameters on Flow Field of Methanol Fuel Injection

Wang Pengli^1,2,
Dong Zhiguo^{1,2
, ,},
Ya Gang^1,2,
Duan Zebin^1,2

1.
School of Mechanical Engineering, Taiyuan University of Techology, Taiyuan 030024, China;
2.
Precision Machining of Shanxi Province Key Laboratory, Taiyuan 030024, China

摘要

摘要: 针对甲醇燃料不同于汽油的物化特性以及甲醇发动机冷启动困难等问题，以甲醇发动机喷油嘴喷孔为研究对象，采用Fluent软件的气液两相VOF湍流模型对喷嘴进行了数值模拟。研究发现了喷嘴入口处曲率半径变化以及喷嘴倒锥角度变化对喷嘴流量和雾化效果有一定的影响。结果表明：在压力不变的条件下，随着入口处曲率半径增大负压层的厚度逐渐变薄，喷孔内部气相体积分数减小，质量流量增大，雾化性能变差，但是喷孔的流速随着曲率半径的增大而增加；增大喷孔的倒锥角，喷嘴出口处的流速及质量流量均减小，但是负压层变厚有利于甲醇燃料的雾化。
- 甲醇燃料 /
- 喷油嘴微孔 /
- 倒锥角 /
- FLUENT /
- 数值模拟
Abstract: According to the different physical and chemical properties of methanol fuel from gasoline, and the difficulty of cold start of methanol engine, we choose the nozzle of methanol engine as the research object. The gas-liquid two-phase VOF turbulence model in Fluent software is used to simulate the nozzle flow. The study finds that the fillet changes in the inlet nozzle and inverted cone angle changes of nozzle have certain influence on nozzle flow field. The results show that under the condition of constant pressure, the thickness of the negative pressure layer decreases with the increase of the radius of curvature at the entrance, the volume fraction of the gas phase decreases and the atomization performance decreases. With the increase of nozzle curvature radius, the flow rate increases. Increasing the inverted cone angle of the nozzle hole, the flow rate at the nozzle outlet is reduced, the mass flow rate is reduced, but the thickening of the negative pressure layer is favorable for the atomization of the methanol fuel.
- methanol fuel nozzle /
- microstructure /
- inverted cone angle /
- Fluent /
- numerical analysis

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参考文献(15)

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