Numerical Investigation of Combustible Channel Walls Ignited by Gas Flow

Abstract:

A study is made of the process of ignition of reactive channel walls by a laminar flow of hot gases, including the stages of heating of a substance and of reacting in the surface layer with self-acceleration of the chemical reaction. The process is determined by the heat exchange between the gas and the wall, the strength of the heat source in the chemical-reaction zone, and the sink of heat due to conduction in the radial and axial directions. In the stage of self-heating, we can have heat sink not only deep into the wall and/or through its external boundary but into the gas flow as well. The problem has been solved in a conjugate formulation. The influence of the temperature, the velocity of the gas at the entrance to the channel, and the wall thickness on ignition characteristics has been studied.In spreading a high temperature gas flow in a channel which walls are made of reactable material there appears a problem dealing with the possibility of their ignition by the flow.

• Periodical: Advanced Materials Research (Volume 1013)
• Pages: 295-299
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.1013.295
• Online since: October 2014
• Authors: Oleg V. Matvienko*, Aleksei Bubenchikov
• Keywords: Combustion, Flow, Heat Transfer, Ignition, Numerical Modeling, Turbulence

References

[1] V.M. Ushakov, O.V. Matvienko, Numerical investigation of the heat exchange and firing of reactive channel walls by a high-temperature swirling-gas glow, Journal of Engineering Physics and Thermophysics. 78 (2005) 541-547.

DOI: 10.1007/s10891-005-0092-8

[2] V.M. Ushakov, A.V. Starchenko, O.V. Matvienko, Mathematical model of ignition of condensed systems by a high-temperature supersonic underexpanded jet, Combustion, Explosion, and Shock Waves. 38 (2002). 409-416.

DOI: 10.1023/a:1016250930093

[3] V.M. Ushakov, O.V. Matvienko, Numerical investigation of unsteady heat exchange in ignition for reactive channel walls by the flow of a high-temperature viscous gas, Journal of Engineering Physics and Thermophysics. 75 (2002) 81-85.

DOI: 10.1007/s10891-005-0092-8

[4] M.A. Leschziner W. Rodi, Computation of strongly swirling axisymmetric free jets, AIAA Journal. 22 (1984) 370-373.

DOI: 10.2514/3.8846

[5] O.V. Matvienko, Analysis of turbulence models and investigation of the structure of the flow in a hydrocyclone, Journal of Engineering and Physics. 77 (2004) 316-323.

DOI: 10.1023/b:joep.0000028510.57907.87

[6] V.M. Ushakov, O.V. Matvienko, Numerical investigation of the heat exchange and firing of reactive channel walls by a high-temperature swirling-gas flow, Journal of Engineering and Physics. 78 (2005) 541-547.

DOI: 10.1007/s10891-005-0092-8

[7] I.G. Dik, O.V. Matvienko, Heat transfer and combustion for a spiral flow in an ideal-dispacement reactor, Journal of Engineering and Physics. 60 (1991) 171-177.

DOI: 10.1007/bf00873060

[8] V.N. Vilyunov, Ignition of Solids, Nauka, Novosibirsk, 1984.

[9] S.G. Ivanushkin, L.V. Kim, V.I. Kondrashov, V.E. Tomilov, Internal Nonstationary Problems of Convective Heattransfer, TSU, Tomsk, 1980.