JAXA Repository / AIREX 未来へ続く、宙(そら)への英知
49049000.pdf6.49 MB
Other TitleDevelopment of a laser absorption NO/NO2 measuring system for gas turbine exhaust jets
Author(jpn)Zhu, Y.; 山田 秀志; 林 茂
Author(eng)Zhu, Y.; Yamada, Hideshi; Hayashi, Shigeru
Author Affiliation(jpn)宇宙航空研究開発機構 航空プログラムグループ; 宇宙航空研究開発機構 航空プログラムグループ; 宇宙航空研究開発機構 航空プログラムグループ
Author Affiliation(eng)Japan Aerospace Exploration Agency Aviation Program Group; Japan Aerospace Exploration Agency Aviation Program Group; Japan Aerospace Exploration Agency Aviation Program Group
Issue Date2005-10-01
PublisherJapan Aerospace Exploration Agency (JAXA)
Publication date2005-10-01
AbstractTo protect the local air quality and the global atmosphere, the emission of the trace species including nitric oxides (NO and NO2) from the stationary gas turbines is regulated by the local governments, and the emissions from aircraft are requested to meet the standards set by the International Civil Aviation Organization. In-situ measurements of such species are needed not only to develop advanced the low-emission combustion technologies but also to provide the data required for the sound assessment of the emissions effects on the emissions on the environment. We have been developing a laser absorption system that can determine NO and NO2 concentrations simultaneously in the exhaust from the aero gas turbines. An optically isolated near-infrared diode laser operating near 1.8 micrometers is used to the detect NO while a visible tunable diode laser operating near 676 nanometers is used for NO2. The system's sensitivity at the elevated temperatures was determined for the trial gas mixtures at 500 K in a heated optical cell with a straight 0.5 m optical path. Sensitivities of 30 ppm-m and 3 ppm-m have been demonstrated for NO and NO2, respectively, at the typical gas turbine exhaust temperature of 500 K. Experiments in the simulated exhaust flows have proven that CO2 and H2O vapor -both major combustion products- do not show interfere with the NO or NO2 measurements.
DescriptionJAXA Research and Development Memorandum
Keywordsnitric oxide; nitrogen dioxide; gas turbine engine; simultaneous measurement; semiconductor laser; exhaust jet; absorption spectrum; in situ measurement; detection limit; reproducibility; multi-pass optical system; 1酸化窒素; 2酸化窒素; ガスタービンエンジン; 同時測定; 半導体レーザ; 排気ジェット; 吸収スペクトル; 原位置測定; 検出限界; 再現性; マルチパス光学系
Document TypeTechnical Report
JAXA Category研究開発資料
Report NoJAXA-RM-05-002

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