Stabilization of Flame in a Ramjet Combustor by Means of a Pilot Gas Generator

摘要

The use of a pilot gas generator to shift the flameout limit in a ramjet combustion chamber toward a higher excess of air was investigated. Flame stabilization in ramjet combustion chambers is difficult, because of the high combustion-chamber inlet velocity and the low temperatures. Often, the flameout limit for lean mixtures is only slightly removed from the stoichiometric mixing ratio. The velocity curves were determined in a typical ramjet combustion chamber system. The lean-mixture flameout limits were measured, first without and then with a pilot gas generator, and compared. A small stoichiometrically-operating propane-oxygen burner is used as the pilot gas generator.