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http://dx.doi.org/10.7316/khnes.2011.22.3.299

An Investigation on Enhencing Thermal Efficiency of a Hydrogen Fueled 2 Stroke Free-piston Engine with Reverse Uni-flow Scavenging  

Byun, Chang-Hee (Grad. School of Sungkyunkwan Univ.)
Baek, Dae-Ha (Grad. School of Sungkyunkwan Univ.)
Lee, Jong-Tae (School of Mechanical Engineering, Sungkyunkwan Univ.)
Publication Information
Transactions of the Korean hydrogen and new energy society / v.22, no.3, 2011 , pp. 299-304 More about this Journal
Abstract
A hydrogen fueled 2 stroke free-piston engine with reverse uni-flow scavenging have a advantageous structure for the backfire occurrence, but it can reduce thermal efficiency by the circuit-flow to go through a exhaust-port. In this research, varied boost pressure, SVOT and exhaust pressure are used in a 2stroke free-piston engine with hydrogen fueled for studying the possibility of increasing thermal efficiency of free-piston hydrogen engine. As a result, to increase thermal efficiency of free-piston are suitable to supply the mixture after port closed the exhaust rater than to use the scanvenging. And it was increased by the exhaust pressure, to achieve it must be used the lean-mixture at SVOT aBDC $34^{\circ}$.
Keywords
Free-piston engine; Hydrogen; Reverse uni-flow; Circuit-flow; COV_imep;
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