Influence of exhaust gas on detonation propensity of a mixture of carbon monoxide, hydrogen and air

• Autorzy: Jach A. , Teodorczyk A.

Identyfikatory

DOI

10.5604/12314005.1213584

• Języki publikacji: EN

Abstrakty

EN

A detonation is the strongest form of all gas explosions. The ease with which a flammable mixture can be detonated (detonability) commonly and traditionally is classified by a detonation cell width λ and an ignition delay time behind the detonation leading shock τ. Additionally, two more parameters were proposed 3 years ago – χ and RSB, which inform about regularity of a detonation structure. The problem of a detonation is significant in industry, in particular in power engineering, where restricted emission standard impose to introduce hydrogen-rich fuels, such as syngas. The most possible initiation of a detonation in industrial conditions is deflagration to detonation transition (DDT), where a deflagration under some conditions (obstacles, confinement, etc.) accelerates and a transition to a detonation takes places. In industry, this acceleration of a flame may progress in initially smoke-filled space. The goal of this paper is to analyse influence of exhaust gas on detonation propensity of a mixture of carbon monoxide and hydrogen. The analysis concerns the detonation cell width λ, ignition delay time τ, RSB and χ parameters. The composition of exhaust gas is calculated by setting it to a state of chemical equilibrium. Combustion temperature influence on exhaust gas composition is assessed. Species, which have the strongest influence on detonability, are assessed. Computations are performed with the use of Cantera tool.

Słowa kluczowe

EN

detonation propensity; syngas; χ; RSB; detonation cell width; exhaust gas; combustion products

• Wydawca: Łukasiewicz Research Network - Institute of Aviation ; European Science Society of Powertrain and Transport KONES Poland ; Wydawnictwo Instytutu Technicznego Wojsk Lotniczych
• Czasopismo: Journal of KONES
• Rocznik: 2016
• Tom: Vol. 23, No. 2
• Strony: 155--161
• Opis fizyczny: Bibliogr. 9 poz., rys.

Twórcy

autor

Jach A.

• Warsaw University of Technology, Institute of Heat Engineering Nowowiejska Street 21/25, 00-665 Warsaw, Poland tel. [phone]

autor

Teodorczyk A.

• Warsaw University of Technology, Institute of Heat Engineering Nowowiejska Street 21/25, 00-665 Warsaw, Poland tel. [phone]

Bibliografia

• [1] Austin, J. M., Shepherd J. E., Detonation in hydrocarbon fuel blends, Combustion and Flame, No. 132, pp. 79-90, 2003.
• [2] Fickett, W., Davis W. C., Detonation, University of California Press, Berkeley – Los Angeles – London 1979.
• [3] Gavrikov, A. I., Efimenko, A. A., Dorofeev S. B., A Model for Detonation Cell Size Prediction from Chemical Kinetics, Combustion And Flame, No. 120, pp. 19-33,2000.
• [4] Goodwin, D. G., Moffat H. K., Speth R. L., Cantera: An object- oriented software toolkit for chemical kinetics, thermodynamics, and transport processes, http://www.cantera.org, Version 2.1.2, 2015.
• [5] Konnov A. A., Detailed reaction mechanism for small hydrocarbons combustion, Release 0.5, available at http://homepages.vub.ac.be/~akonnov/, 2000.
• [6] Radulescu, M. I., Borzou, B., Evaluation of hydrogen, propane and methane-air detonations instability and detonability, International Conference of Hydrogen Safety, 2013.
• [7] Radulescu, M. I., Sharpe, G. J., Bradley D., A universal parameter quantifying explosion hazards, detonability and hot spot formation: χ number, ISFEH7 Proceedings of the Seventh International Seminar, 2013.
• [8] Saif, M., Wang, W., Pękalski, A., Levin, M., Radulescu, M. I., Chapman-Jouguet deflagrations and their transition to detonation, Proceedings of the Combustion Institute, Seoul 2016.
• [9] Shock & Detonation Toolbox, Graduate Aerospace Laboratories of the California Institute of Technology, Caltech, http://www2.galcit.caltech.edu/EDL/public/cantera/html/SD\_Toolbox.

Uwagi

PL

Opracowanie ze środków MNiSW w ramach umowy 812/P-DUN/2016 na działalność upowszechniającą naukę.