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Non-Self-Maintained Discharge Application for Fuel Activation

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Final technical rept. 1 Sep 2007-31 Aug 2010

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This report results from a contract tasking FSUE MRTI RAS as follows Nowadays application of electrons created by electron beams and accelerated in external electric field for preliminary ionization and activation of flammable mixtures in high-speed flows is poorly investigated scientific direction. In pioneering experimental works it was shown that combustion completeness improves in combined impact of electron beam and electric field on weakly supersonic flow of propane-air mixture, but mechanisms of processes in the plasma left unclear. Nonhomogeneous distributions of main plasma and flow parameters and high gas temperature in the set up have lead to difficulties of theoretical analysis, but it was shown that created plasma represents a composition of highly ionized, electronically and vibrationally excited molecules and active atoms. Presence of active atoms leads to decrease of ignition times by 2-6 times with respect to power put into the mixture. Basing on experience of these works one can assert that preliminary ionization and excitation of flammable mixture molecules accelerates combustion processes in high-speed flows. At that the application of combined method requires clarification of reaction accelerating mechanisms and aerodynamics impact on combustion processes in non-equilibrium conditions. Main task of this project is modification of model flammable mixture with the aim of combustion process efficiency improvement decrease of combustion time, i.e. increase of flame propagation velocity combustion intensification of lean mixtures. For investigation of electron-beam plasma impact on combustion of propane-air mixture in the high-speed flow we suppose to undertake experimental investigations with a help of electron beam set up.

Subject Categories:

  • Electricity and Magnetism
  • Fuels
  • Jet and Gas Turbine Engines

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