1983-02-01

The Role of Chemical Activity and Turbulence Intensity in Prechamber-Torch Organization of Combustion of a Stationary Flow of a Fuel-Air Mixture 830592

The present paper is concerned with the main experimental facts and generalized results of an investigation into an interaction of the chemico-kinetic and gas-hydrodynamic factors of initiation and promotion of Inflammation and turbulent combustion of a stationary flow of the working mixture by a prechamber-torch of a stationary flow of the combustion products of an auxiliary mixture. This interaction is shown to be most favorable, with the lowest temperatures and shortest delays giving the most reliable inflammation, with the fastest and most complete turbulent combustion stabilized over the widest range. This occurs only in the case of independent formation of high thermodynamically super equilibrium concentrations of chemically active hydrogen atoms, hydrogen-containing radicals, and other chemically active particles in the products of incomplete combustion of the rich auxiliary mixture in the prechamber. They are discharged therefrom, after a short residence time in the prechamber, into the working mixture of the combustion chamber in a small amount (about 2-3%) and at a small (about half the critical value) subcritical pressure difference between the prechamber and the combustion chamber via short outlet, sharp-edged channels of a small cross-section and forming multiple-small-kernel of discrete turbulent structure of the main mixture in the combustion zone. This principal and technology underlies the forced controlled organization of an avalanche activation of the combustion process (the LAG-Process).

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