@techreport{oai:jaxa.repo.nii.ac.jp:00002651, author = {Zhu, Y. and 山田, 秀志 and 林, 茂 and Zhu, Y. and Yamada, Hideshi and Hayashi, Shigeru}, month = {Oct}, note = {To 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., 資料番号: AA0049049000, レポート番号: JAXA-RM-05-002}, title = {半導体レーザーを用いたガスタービン排気ジェット中のNO/NO2同時測定装置の研究開発:半導体レーザーを用いたNO/NO2ガス同時測定装置}, year = {2005} }