Three-dimensional CFD (computational fluid dynamics) analysis of scavenging process in a two-stroke free-piston engine

Three-dimensional CFD (computational fluid dynamics) analysis of scavenging process in a two-stroke free-piston engine
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二冲程自由活塞发动机扫气过程的三维CFD(计算流体动力学)分析

DOI:
10.1016/j.energy.2014.02.107
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发表时间:
2014-04
期刊:
影响因子:
9
通讯作者:
Jiancai Wang
Jiancai Wang
中科院分区:
工程技术1区
文献类型:
--
作者:
Yang Wang;Xudong Zhen;Shuai Guan;Jiancai Wang

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天津大学SKLE(国家重点发动机图书馆)提出了一种HFPE(液压自由活塞发动机),作为显着提高IC(内燃机)发动机循环热效率和降低废气排放的手段。由于传统发动机中很难看到活塞动力学和气缸结构,因此建立了 3-D(三维)CFD(计算流体动力学)模型来研究扫气过程。研究了各种结构和运行参数,包括进气口径向角、进气口高度和运行频率。通过优化,我们达到了最高扫气效率0.907,比原设计提高了11%。
A HFPE (hydraulic free-piston engine) has been proposed by the SKLE (State Key Library of Engines) in Tianjin University as a mean to significantly improving the IC (Internal Combustion) engines' cycle thermal efficiency and lowering exhaust emissions. As the piston dynamic and the cylinder structure are hardly seen in conventional engine, a 3-D (three-dimensional) CFD (computational fluid dynamics) model was built to investigate the scavenging process. A wide range of structure and operating parameters were investigated including the intake port radial angle, intake port height and operating frequency. We achieved the highest scavenging efficiency 0.907 through optimization, which is 11% higher than that of the original design.
DOI: 10.1016/j.applthermaleng.2007.03.015
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