Development and validation of a free-piston engine generator numerical model

Boru Jia, Zhengxing Zuo, Guohong Tian*, Huihua Feng, A. P. Roskilly

*此作品的通讯作者

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130 引用 (Scopus)

摘要

This paper focuses on the numerical modelling of a spark ignited free-piston engine generator and the model validation with test results. Detailed sub-models for both starting process and steady operation were derived. The compression and expansion processes were not regarded as ideal gas isentropic processes; both heat transfer and air leakage were taken into consideration. The simulation results show good agreement with the prototype test data for both the starting process and steady operation. During the starting process, the difference of the in-cylinder gas pressure can be controlled within 1 bar for every running cycle. For the steady operation process, the difference was less than 5% and the areas enclosed on the pressure-volume diagram were similar, indicating that the power produced by the engine and the engine efficiency could be predicted by this model. Based on this model, the starting process with different starting motor forces and the combustion process with various throttle openings were simulated. The engine performance during stable operation at 100% engine load was predicted, and the efficiency of the prototype was estimated to be 31.5% at power output of 4 kW.

源语言英语
页(从-至)333-341
页数9
期刊Energy Conversion and Management
91
DOI
出版状态已出版 - 2月 2015

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Jia, B., Zuo, Z., Tian, G., Feng, H., & Roskilly, A. P. (2015). Development and validation of a free-piston engine generator numerical model. Energy Conversion and Management, 91, 333-341. https://doi.org/10.1016/j.enconman.2014.11.054