Study on the combustion process and work capacity of a micro free-piston engine

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• 作者：Qian Wang ; Liming Dai ; Kai Wu ; Jin Bai…
• 关键词：Free ; piston ; Micro engine ; HCCI ; Pressure experiment ; Work capacity
• 刊名：Journal of Mechanical Science and Technology
• 出版年：2015
• 出版时间：November 2015
• 年：2015
• 卷：29
• 期：11
• 页码：4993-5000
• 全文大小：1,145 KB
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• 作者单位：Qian Wang (1)
  Liming Dai (1)
  Kai Wu (1)
  Jin Bai (1)
  Zhixia He (2)
  
  1. School of Energy and Power Engineering, Jiangsu University, Zhenjiang, 212013, China
  2. Institute for Energy Research, Jiangsu University, Zhenjiang, 212013, China
  
• 刊物类别：Engineering
• 刊物主题：Mechanical Engineering
  Structural Mechanics
  Control Engineering
  Industrial and Production Engineering
  
• 出版者：The Korean Society of Mechanical Engineers
• ISSN：1976-3824

文摘

With the main idea of exploring combustion conditions and the work capacity of the micro free-piston engine, the study concern is visualization work including Homogeneous charge compression ignition (HCCI) combustion in the micro-chamber. The initial freepiston velocity was adjusted to achieve a wide range of compression ratio. The combustion characteristics, the piston motion and pressure variations under different compression ratios were discussed. Results indicate that the critical combustion condition occurs when the compression ratio rises to a certain degree. Two-stage combustion characteristics can be observed in micro HCCI combustion processes with the fuel of the DME/oxygen mixture. The micro-chamber pressure increases with the increase of the compression ratio. The critical peak pressure of 5.4 MPa is obtained when the initial piston velocity reaches 15.0 m/s and the diameter and the length of the microchamber is 3 mm and 37 mm, respectively.