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2D Temperature Measurement of CT-TDLAS by Using Two-Ratios-of-Three-Peaks Algorithm

컴퓨터토모그래피 레이저흡수분광법(CT-TDLAS) 기반 2차원 온도분포 산정 Two-Ratios-of-Three-Peaks (2R3P) 알고리듬 개발

  • CHOI, DOOWON (Dept. of Electronics and Communication Eng., Korea Maritime & Ocean Univ.) ;
  • CHO, GYONGRAE (Division of Mechanical Eng., Korea Maritime & Ocean Univ.) ;
  • SHIM, JOONHWAN (Dept. of Electronics and Communication Eng., Korea Maritime & Ocean Univ.) ;
  • DEGUCHI, YOSHIHIRO (Graduate School of Advanced Tech., & Science, Tokushima Univ.) ;
  • KIM, DONGHYUK (Division of Mechanical Eng., Korea Maritime & Ocean Univ.) ;
  • DOH, DEOGHEE (Division of Mechanical Eng., Korea Maritime & Ocean Univ.)
  • 최두원 (한국해양대학교 전자통신공학과) ;
  • 조경래 (한국해양대학교 공과대학 기계공학부) ;
  • 심준환 (한국해양대학교 전자통신공학과) ;
  • ;
  • 김동혁 (한국해양대학교 공과대학 기계공학부) ;
  • 도덕희 (한국해양대학교 공과대학 기계공학부)
  • Received : 2016.06.01
  • Accepted : 2016.06.30
  • Published : 2016.06.30

Abstract

In order to improve the performance of temperature field measurements by CT-TDLAS (Computer Tomography Tunable Diode Laser Absorption Spectroscopy), a new reconstruction algorithm, named two-ratios-of-three-peaks method is proposed in this paper. Further, two methods for selecting appropriate initial values of the iterative calculation of CT-TDLAS are proposed. One is MLOS (multiplicative line of sight) method and the other one is ALOS (additive line of sight) method. Two-ratios-of-three-peaks (2R3P) algorithm combined with MART (multiplicative algebraic reconstruction technique) is finally developed for the enhancements of reconstructive calculations. The results have been compared with those obtained by the conventional one-ratio-of-two-peaks (1R2P) algorithm. In order to evaluate the performance of this algorithm, numerical test has been performed using phantom Gaussian temperature distributions with $11{\times}11$ square mesh. The performance of the constructed algorithm has been demonstrated by comparing the results obtained in actual burner experiments with those obtained by thermocouples. It has been verified that 2R3P algorithm with MART and MLOS showed best performance than that of 1R2P algorithm.

Acknowledgement

Supported by : 한국연구재단

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