Design and Combustion Characteristic Analysis of Free Piston Stirling Engine External Combustion System

  • Xudong Jin (金旭东)Email author
  • Tian Lü (吕田)
  • Guoyao Yu (余国瑶)
  • Jiawei Liu (刘佳伟)
  • Xiaoyu Huang (黄晓宇)


The free piston Stirling engine external combustion system was simulated to investigate the diesel-air combustion characteristics in order to demonstrate its feasibility by computational fluid dynamics (CFD). The different effects on combustion were distinguished by analyzing the combustion burner, the injection position of diesel oil, the front tube arrangement of Stirling heater head and the back fin. The results show that the tilted front tube arrangement of the heater head with the back fin is the best practicable technology while the distance between the diesel nozzle position and the swirler top is 0. Its total heat flux is 15.6 kW, and the average heat transfer coefficients of the front and back tubes are 127W/(m2 · K) and 192W/(m2 · K), respectively. The heat transfer is mainly through convection, and the proportion of radiative heat transfer is only 16.9%. The best combustion efficiency of the free piston Stirling engine external combustion system is 86%.

Key words

Stirling engine external combustion system numerical simulation diesel-air combustion 

CLC number

TK 16 

Document code


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Copyright information

© Shanghai Jiaotong University and Springer-Verlag GmbH Germany, part of Springer Nature 2018

Authors and Affiliations

  • Xudong Jin (金旭东)
    • 1
    Email author
  • Tian Lü (吕田)
    • 1
  • Guoyao Yu (余国瑶)
    • 2
  • Jiawei Liu (刘佳伟)
    • 1
  • Xiaoyu Huang (黄晓宇)
    • 1
  1. 1.Shanghai Marine Diesel Engine Research InstituteShanghaiChina
  2. 2.Key Laboratory of Cryogenics, Technical Institute of Physics and ChemistryChinese Academy of SciencesBeijingChina

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