Sensitivity and effect of key operational parameters on performance of a dual-cylinder free-piston engine generator

投稿的翻译标题: 双缸型自由活塞内燃发电机关键运行参数的性能影响特性及敏感度分析

Zhi yuan Zhang, Hui hua Feng*, Bo ru Jia, Zheng xing Zuo

*此作品的通讯作者

科研成果: 期刊稿件文章同行评审

摘要

The free-piston engine generator (FPEG) is regarded as the next generation of energy conversion system which may replace traditional engines in the future. The effect of key operational parameters like excess air ratio of input mixture and ignition position on the engine performance of a dual-cylinder FPEG was investigated, and their sensitivity was analyzed in this paper. The operating compression ratio of the system is susceptible to changes in excess air ratio and ignition position. At the same time, it decreases from 15.8 to 6.6 when excess air ratio increases from 0.85 to 1.15, but it increases from 6.1 to 13.3 as ignition position increases from 15 mm to 20 mm. The operating frequency and indicated power are more sensitive to changes in excess air ratio than ignition position. But it is the opposite for the indicated thermal efficiency and friction loss. Excess air ratio and ignition position have a quite similar influence on heat transfer. Therefore, from the perspective of system operation and performance, it is preferable to keep excess air coefficient slightly below 1.0. In contrast, when selecting ignition position, it is of great importance to comprehensively consider the risk of structural damage caused by the increase in the compression ratio and in-cylinder gas pressure.

投稿的翻译标题双缸型自由活塞内燃发电机关键运行参数的性能影响特性及敏感度分析
源语言英语
页(从-至)2101-2111
页数11
期刊Journal of Central South University
29
7
DOI
出版状态已出版 - 7月 2022

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Zhang, Z. Y., Feng, H. H., Jia, B. R., & Zuo, Z. X. (2022). Sensitivity and effect of key operational parameters on performance of a dual-cylinder free-piston engine generator. Journal of Central South University, 29(7), 2101-2111. https://doi.org/10.1007/s11771-022-5088-4