Flame holder

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A flame holder is a component of a jet engine designed to help maintain continual combustion.

All continuous-combustion jet engines require a flame holder. A flame holder creates a low-speed eddy in the engine to prevent the flame from being blown out. The design of the flame holder is an issue of balance between a stable eddy and drag.

The simplest design, often used in amateur projects, is the can-type flame holder, which consists of a can covered in small holes. Much more effective is the H-gutter flame holder, which is shaped like a letter H with a curve facing and opposing the flow of air. Even more effective, however, is the V-gutter flame holder, which is shaped like a V with the point in the direction facing the flow of air. Some studies have suggested that adding a small amount of base bleed to a V-gutter helps reduce drag without reducing effectiveness.

The first mathematical model of a flame holder was proposed in 1953.[1]

References[edit]

  1. ^ Matkowsky, B. J.; Olagunju, D. O. (1981). "Pulsations in a Burner-Stabilized Premixed Plane Flame". SIAM Journal on Applied Mathematics. 40 (3): 551–562. doi:10.1137/0140046. JSTOR 2101350.  See p. 552.