A numerical study of intake valve jet flapping in a gasoline direct injection engine
A numerical study of intake valve jet flapping in a gasoline direct injection engine
复制标题
汽油直喷发动机进气门射流扑动数值研究
DOI：
10.1504/ijpt.2018.10011445
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发表时间：
2018
影响因子：
--
通讯作者：
W. Malalasekera
中科院分区：
文献类型：
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作者：
N. J. Beavis;S. Ibrahim;W. Malalasekera
本文介绍了使用大涡模拟 (LES) 湍流建模方法对汽油直喷 (GDI) 发动机内进气门射流扑动进行数值研究的结果。介绍并讨论了实验测试用例和计算设置，包括亚网格尺度 (SGS) 湍流模型的选择。详细讨论了进气门射流拍动明显的示例循环。发现进气门射流拍动是由于进气门帘中的湍流波动而引发的。研究了阀帘质量通量的逐周期变化和随后的射流扑动事件，并发现了显着的循环变化。据观察，当应用通常用于 LES 模拟和实验 PIV 数据后处理的集合平均程序时，由于阀帘质量通量变化的循环变化，与这种流动现象相关的大多数信息都会丢失。
This paper presents findings from a numerical study of intake valve jet flapping within a gasoline direct injection (GDI) engine, using a large eddy simulation (LES) turbulence modelling approach. The experimental test case and computational setup, including choice of sub-grid scale (SGS) turbulence model, are presented and discussed. An example cycle where intake valve jet flapping is seen to be prominent is discussed in detail. Intake valve jet flapping was found to be initiated as a consequence of turbulent fluctuations in the intake valve curtains. Cycle-by-cycle variations in valve curtain mass flux and the subsequent jet flapping events are investigated and significant cyclic variability is found. It was observed that when an ensemble-averaging procedure, typically used in LES simulations and experimental PIV data post-processing, is applied, due to the cyclic variability of the variations in valve curtain mass flux, most of the information related to this flow phenomenon is lost.
使用 LES 和 POD 对 GDI 发动机流动进行数值模拟
DOI：
10.4271/2016-01-0598
发表时间：
2016
期刊：
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影响因子：
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作者：
Beavis N
通讯作者：
Beavis N