Citation: | WANG Xiaoyan, KANG Tianqin, WANG Peilun, JIA Demin, XU Yu, ZHAO Jianhui. Simulation Research on Ejector for Natural Gas Engine with High Exhaust Gas Recirculation Rate[J]. Journal of Southwest Jiaotong University, 2024, 59(2): 467-476. doi: 10.3969/j.issn.0258-2724.20210950 |
In view of engine knock, a technical solution was proposed to achieve a natural gas engine with a high exhaust gas recirculation (EGR) rate by utilizing a zero-power consumption ejector. Firstly, the structural parameters of the ejector were designed and calculated under specified operating conditions. Subsequently, the ejector simulation model was established, and the model was verified using experimental data. Furthermore, the ejection performance variations of the ejector with structural parameters were analyzed, and the influence of structural parameters on ejection performance was obtained. Lastly, a novel sensitivity evaluation index for structural parameters was introduced to examine the extent of their influence on ejection performance. The results show that as the length of the mixing section and the diffuser section increase, the entrainment coefficient (
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