Measurements of the reaction between NO and O3 in a jet stream of NO dilute gas by LIF methods

• Published in: Nihon Kikai Gakkai rombunshuu. B hen Vol. 68; no. 672; pp. 145 - 151
• Main Authors: Nakaya, S, Shiba, S, Araki, M, Oshita, M, Tsue, M, Kono, M
• Format: Journal Article
• Language: Japanese
• Published: 01.08.2002
• ISSN: 0387-5016

An experimental study on the effect of jet exhaust gas in a simulated ozone layer was conducted. A stratospheric condition was simulated in the use of a vacuum chamber, where its pressure was sustained at 2.67 kPa, this being equal to that at 25-km altitude. NO gas, which was diluted by N2, was fired from a nozzle as an exhaust gas in the simulated ozone layer. NO and NO2 concentration in jet streams were measured by LIF methods, and then reaction amounts between NO and O3 were derived from these LIF images. The reaction rate derived from NO-LIF was much greater than the actual one, because O3 absorbed the laser beam near about 226.1 nm to simulate the NO molecular and NO-LIF signal. It was not proper to use the NO-LIF method to determine the reaction amount between NO and O3. However, it was useful to visualize the flow in this condition because of its strong intensity. The reaction amount derived from NO2-LIF was valid compared with the result from simple calculations. NO2-LIF should be used to measure the reaction rate qualitatively between NO and O3 in a simulated ozone layer.