LIF法を使用した模擬オゾン層におけるNO希釈ガス噴流中におけるNO-O_3反応の測定(熱工学,内燃機関,動力など)  [in Japanese] Measurements of the Reaction between NO and O_3 in a Jet Stream of NO Dilute Gas by LIF Methods  [in Japanese]

An experimental study on an effect of jet exhaust gas in a simulated ozone layer was conducted. A stratospheric condition was simulated in use of a vacuum chamber, where its pressure was sustained 2.67 kPa, this being equal to the one at the altitude 25 km. NO gas, which was diluted by N_2, was fired from a nozzle as an exhaust gas in the simulated ozone layer. NO and NO_2 concentration in jet streams were measured by LIF methods, and then reaction amounts between NO and O_3 were derived from these LIF images. The reaction rate derived from NO-LIF was much bigger than the actual one, because O_3 absorbed laser beam near about 226.1 nm to simulate NO molecular and NO-LIF signal. It was not proper to use NO-LIF method to determine the reaction amount between NO and O_3. However, it was useful to visualize the flow in this condition because of its strong intensity. The reaction amount derived from NO_2-LIF was valid compared with a result of simple calculations. NO_2-LIF should be used to measure the reaction rate qualitatively between NO and O_3 in the simulated ozone layer.