Abstract
Combustion diagnosis is crucial for quantifying exhaust gas and calculating combustion efficiency. Temperature, concentration, and velocity measurements allow for the accurate identification of combustion conditions. However, the current diagnostic equipment used to assess the combustion state has various issues, such as flow disturbance caused by probes and measurement delays caused by sampling. Furthermore, using multiple measurement devices can be particularly inconvenient. This study confirmed the potential application of an exhaust gas emission and engine operation monitoring system by simultaneously measuring temperature, concentration, and velocity using tunable diode laser absorption spectroscopy (TDLAS) technology. To determine the combustion chamber of methane combustion, multiple laser beams that are separated using a beam splitter were arranged in various forms to measure temperature, concentration, and velocity. The reconstructed temperature and concentration distribution results for each position of the measurement cell case showed similar trends at identical measurement positions. Additionally, experiments confirmed that the velocity measured by laser crossing at a 45-degree angle from the center increased as the supply gas flow rate increased.
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Abbreviations
- A :
-
Absorbance
- I 0 :
-
Intensity of incident light
- I t :
-
Intensity of transmitted light
- L :
-
Laser path length
- S(T) :
-
Temperature-dependent absorption line strength
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Acknowledgments
This research was supported by the Basic Science Research Program through the National Research Foundation of Korea (NRF), which was funded by the Ministry of Education (No. 2021R1I1A3061305). The study was conducted with the support of the research fund from the academic research project of the Republic of Korea Naval Academy’s Ocean Research Institute in 2023.
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Jeong-Woong Hong earned his B. degree in Industrial Eng. at Hongik Univ. in 2017. He earned his M.S. degree in Refrigeration, Air-conditioning Eng. at Korea Maritime & Ocean Univ. in 2021. He is currently taking a Ph.D. course in the Division of Marine System Engineering at Korea Maritime & Ocean Univ. His research interests include the fundamentals of combustion and flow visualizations in industry and marine and offshore machinery.
Youngmin Kim is in a master’s course in the Depart. of Marine System Eng. at Korea Maritime & Ocean Univ. His research interests are plasma combustion, electric fields, and acoustic instability.
Sung Hwan Yoon earned his B.S. and M.S. degrees in the Dept. of Mech. Eng. Pukyong National Univ. in 2012 and 2014, respectively. He received his Ph.D. degree in the Mech. & Space Eng. in Hokkaido Univ., Japan in 2016. He is currently an Associate Professor in the Depart. of Marine System Eng. at Korea Maritime & Ocean Univ. His research interests include fundamental combustion, acoustic instability, gas turbines, and plasma combustion.
Min-Gyu Jeon earned his B.S. and M.S. degrees in Refrigeration, Air-conditioning Eng. at Korea Maritime & Ocean Univ. in 2012 and 2014, respectively. He received his Ph.D. degree in the Dept. of Mech. Eng. in Tokushima Univ., Japan in 2018. He is currently an Assistant Professor in the Department of Mechanical System Engineering at Republic of Korea Naval Academy. His research interests include the fundamentals of combustion and flow visualizations in industry and marine and offshore machinery.
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Hong, JW., Kim, Y., Yoon, S.H. et al. Simultaneous measurement of temperature, concentration, and velocity in the combustion field using TDLAS. J Mech Sci Technol 37, 5199–5206 (2023). https://doi.org/10.1007/s12206-023-0922-7
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DOI: https://doi.org/10.1007/s12206-023-0922-7