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Second Thermal and Fluids Engineering  Conference

ISSN: 2379-1748
ISBN: 978-1-56700-430-4

Application of Computed Tomography - Tunable Diode Laser Absorption Spectroscopy to Combustion Analysis

Yoshihiro Deguchi
Graduate School of Advanced Technology and Science, The University of Tokushima, Tokushima 770-8501, Japan

Takahiro Kamimoto
Graduate School of Advanced Technology and Science, The University of Tokushima, Tokushima 770-8501, Japan

Masato Nakagawa
Tokushima University, 1-2 Minamijosanjima-cho, Tokushima 770-8501, Japan

Kazuki Tainaka
Central Research Institute of Electric Power Industry, 2-6-1 Nagasaka, Yokosuka-shi, Kanagawa, 240-0196, Japan

Kenji Tanno
Central Research Institute of Electric Power Industry, 2-6-1 Nagasaka, Yokosuka-shi, Kanagawa, 240-0196, Japan

Abstract

Two dimensional (2D) temperature and concentration distribution plays an important role for the combustion structure and the combustor efficiency in engines, burners, gas turbines and so on. In this study, the theoretical and experimental research has been conducted in order to develop the non-contact and fast response 2D temperature and concentration distribution measurement method. The method is based on a computed tomography (CT) using absorption spectra of molecules such as H2O, CH4, NH3, CO2 and so on. CT-TDLAS was applied to several combustion fields such as a pulverized coal burner and a high pressure constant volume combustor to demonstrate its applicability to various types of combustor. The time resolved 2D temperature distributions were successfully measured using 16-path and 32-path CT-TDLAS measurement cells. CT-TDLAS has the kHz response time and the method enables the real-time 2D and 3D species concentration measurement to be applicable to the combustion analysis.

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