Experimental study of the emission of electronically excited CH*, C*2, OH*, and CO*2 during ignition of hydrocarbons behind reflected shock waves

31st International Conference on Equations of State for Matter

Tereza, A.M.^1 ; Demidenko, T.S.^2 ; Garmash, A.A.^2 ; Smirnov, V.N.^1 ; Shumova, V.V.^1,3 ; Vlasov, P.A.^1,2

Semenov Institute of Chemical Physics, Russian Academy of Sciences, Kosygina 4, Moscow

119991, Russia^1

National Research Nuclear University MEPhI, Moscow Engineering Physics Institute, Kashirskoe Shosse 31, Moscow

115409, Russia^2

Joint Institute for High Temperatures, Russian Academy of Sciences, Izhorskaya 13 Bldg 2, Moscow

125412, Russia^3

关键词: Auto-ignition;    Emission signal;    Ignition delay time;    Key reactions;    Kinetic mechanism;    Measured values;    Reflected shock waves;    Temperature range;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/774/1/012080/pdf
DOI  :  10.1088/1742-6596/774/1/012080

来源: IOP

【 摘 要 】

The autoignition of simple hydrocarbons, such as ethane, ethylene, and acetylene, in mixtures with oxygen diluted with Ar behind reflected shock waves in a temperature range of 1150-1800 K and a pressure of ∼ 0.1 MPa is studied using the chemiluminescence from electronically excited CH∗ (λ = 430 nm), C2∗ (λ = 516.5 nm), OH∗ (λ = 308 nm), and CO2∗ (λ = 363 nm). Our experimental results are in good agreement with the published data obtained under similar conditions. Numerical simulations within the framework of a well-tested kinetic mechanism closely reproduce the measured values of the ignition delay times and time profiles of the emission signals. A comparison of the experimental and calculated shapes of the emission signals made it possible to identify key reactions responsible for the chemiluminescence of the indicated emitters.