Transactions of the Korean hydrogen and new energy society (한국수소및신에너지학회논문집)

The Korean Hydrogen and New Energy Society (한국수소및신에너지학회)
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Calculating of 3-Dimensional Temperature Distribution for High-Temperature Exhaust Gas Using CT-TDLAS

CT-TDLAS를 이용한 고온 배기가스의 3차원 온도분포 측정

  • YOON, DONGIK (Division of Refrigeration & Air-conditioning Eng., Graduate School of Korea Maritime & Ocean University) ;
  • KIM, JOONHO (Division of Convergence Study on the Ocean Science and Technology, Graduate School of Korea Maritime & Ocean University) ;
  • JEON, MINGYU (Division of Advanced Technology and Science, Graduate School of Tokushima University) ;
  • CHOI, DOOWON (Division of Mechanical Eng., Korea Maritime & Ocean University) ;
  • CHO, GYEONGRAE (Division of Mechanical Eng., Korea Maritime & Ocean University) ;
  • DOH, DEOGHEE (Division of Mechanical Eng., Korea Maritime & Ocean University)
  • 윤동익 (한국해양대학교 대학원 냉동공조공학과) ;
  • 김준호 (한국해양대 대학원 해양과학기술융합학과) ;
  • 전민규 (도쿠시마 대학교 첨단과학기술대학원) ;
  • 최두원 (한국해양대학교 기계공학부) ;
  • 조경래 (한국해양대학교 기계공학부) ;
  • 도덕희 (한국해양대학교 기계공학부)
  • Received : 2018.01.26
  • Accepted : 2018.02.28
  • Published : 2018.02.28
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Abstract

3-dimensional temperature distribution of the exhaust gas of a fire flame of LPG have been measured by the constructed CT-TDLAS system. 3-Dimensional temperature distributions are measured by 2 layers of CT-TDLAS. Each layer has $8{\times}8$ laser beams implying the temperatures of 64 meshes are measured. SMART algorithm has been adopted for reconstructing the absorption coefficients on the meshes. The line strengths at 6 representative wave lengths of $H_2O$ have been used for obtaining the absorption spectra of the exhaust gas. The temperature distributions measured by the constructed CT-TDLAS have been compared with those by the thermocouples. The relative errors measured between by thermocouple and CT-TDLAS were 13% in average and 33% at maximum. The similarity of temperature distribution between by thermocouples and by CT-TDLAS has been shown at the lower layer than the upper layer implying an unstability of combustions.

Keywords

References

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