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http://dx.doi.org/10.7316/KHNES.2012.23.4.404

A Numerical Simulation for the Spring Hardness of a Free Piston Linear Engine  

Hung, Nguyenba (Graduate of Mechanical and Automotive Engineering, University of Ulsan)
Oh, Yong-Il (Graduate of Mechanical and Automotive Engineering, University of Ulsan)
Park, Kyu-El (Department of Mechanical and Automotive Engineering, University of Ulsan)
Lim, Ock-Taeck (Department of Mechanical and Automotive Engineering, University of Ulsan)
Publication Information
Transactions of the Korean hydrogen and new energy society / v.23, no.4, 2012 , pp. 404-411 More about this Journal
Abstract
This research numerically analyses the effects of the damping device on the operation characteristics of a free piston linear engine. In this paper, the free piston linear engine uses spring as a damping device. The investigated parameter is spring hardness which is varied at 0.5, 1, 2.9, and 14.7 N/mm. The effects of spring hardness on the dynamic characteristic, thermodynamic characteristic and electric power of the engine are investigated. Beside, the equivalent ratio is also changed to provide more information for this study. The simulation results show that, by increasing spring hardness from 0.5 to 14.7 N/mm, all of parameters related to dynamic characteristic such as piston velocity, acceleration, displacement, and frequency increase accordingly. Beside, the peak pressure in the cylinder and electric power are also increased when increasing spring hardness. The tendency is also observed at varied equivalent ratios.
Keywords
Spring hardness; Free piston; Linear engine;
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Times Cited By KSCI : 1  (Citation Analysis)
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1 R. Mikalsen and A.P. Roskilly, A review of free-piston engine history and applications, Applied Thermal Engineering, Vol. 27, 2007, pp. 2339-2352.   DOI
2 Q.F. Li, J. Xiao, and Z. Huang, Simulation of a Two-Stroke Free-Piston Engine for Electrical Power Generation, Energy & Fuels, Vol. 22, 2008, pp. 3443-3449.   DOI
3 J. Xiao, Q.F. Li, and Z. Huang, Motion characteristic of a free piston linear engine, Applied Energy, Vol. 87, 2010, pp. 1288-1294.   DOI
4 J.B. Heywood, Internal Combustion Engine Fundamentals, McGraw-Hill Book Company, New York, USA, 1988.
5 C.M. Atkinson, S. Petreanu, N.N. Clark, R.J Atkinson, T.I. McDaniel, S. Nandkumar, and P. Famouri, Numerical Simulation of a Two-Stroke Linear Engine-Alternator Combination, SAE, No. 1999-01-0921, 1999, pp. 1-15.
6 Yongil Oh, Gangchul Kim, and Ocktaeck Lim, A Study for Generating Power on Operating Parameters of Powerpack utilizing Linear Engine, Trans. of the Korean Hydrogen and New Energy Society, Vol. 23, No. 2, 2012, pp. 183-190.   DOI