DOI QR코드

DOI QR Code

역단류 소기방식을 갖는 2행정 프리피스톤 수소기관의 열효율 향상에 관한 연구

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

  • 투고 : 2011.04.15
  • 심사 : 2011.06.20
  • 발행 : 2011.06.30

초록

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 $34^{\circ}$.

키워드

참고문헌

  1. R. Mikalsen, A. P. Roskilly, "A review of freepiston history and applications", Appl. Therm. Eng., Vol. 27, 2007, pp. 2339-2352. https://doi.org/10.1016/j.applthermaleng.2007.03.015
  2. Jakob Fredriksson, Ingemar Denbratt, "Simulation of a Two-Stroke Free Piston Engine", SAE Paper NO.2004-01-1871, 2004.
  3. G. P., Blair, "Correlation of Theory and Experiment for Scavenging Flow in Two-Stroke Cycle Engine", SAE Paper NO. 88125, 1988.
  4. H. W. Cho, J. S. Yoon, J. T. Lee, "Backfire Occurrence of Uni-flow scavenging Type Twostroke Free-Piston Hydrogen Fueled Engine", Proceeding of the KSME Annual Spring Meeting 2008, pp. 44-49,
  5. H. W. Cho, K. Y. Cho, J. T. Lee, "Flow characteristics in a hydrogen fueled free piston engine with reverse uniflow scavenging", Proceeding of the KSAE Annual Autumn Meeting 2008.
  6. K. Y. Cho, C. H. Byun, J. T. Lee, "The characteristics of backfire for a hydrogen fueled freepiston engine with reverse uniflow scavenging", Proceeding of the KSAE Annual Autumn Meeting 2009.
  7. C. W. Park, C. H. Kim, "A Study on Performance and Emission Characteristics for Gasoline- Hybrid Engine with EGR", Proceeding of the KSAE Annual Spring Meeting 2007, Vol. 4, pp. 1777-2439.
  8. D. W. Nam, Tran dang quoc, J. T. Lee, "A Study on Lean limit and Emission Characteristic in Heavy-duty Direct Injection CNG Engine with EGR", Proceeding of the KSME Annual Spring Meeting 2008, pp. 1-239.