Flameholder for gas turbine engine afterburner

Details Flameholder for gas turbine engine afterburner Flameholder for gas turbine engine afterburner

1990-10-31

1992-07-14

Bertsch, Richard A.

Power plants

Reaction motor

Liquid oxidizer

60749, F02K 310

Patent

active

051292262

ABSTRACT:
A V-shaped afterburner flameholder for a gas turbine engine has a plurality of rectangular tabs coextensive with and lying in the planes of the flameholder sidewalls. The tabs on opposing sidewalls alternate so as to introduce streamwise and spanwise (transverse) vortices in the flowing gas. The resultant streamwise vortices tend to reduce resonating vortex oscillations (screech) and the need for an acoustic liner to suppress such screech.

REFERENCES:
patent: 2714287 (1955-08-01), Carn
patent: 2919550 (1960-01-01), Kaskan et al.
patent: 3041836 (1962-07-01), Truman et al.
patent: 4445339 (1984-05-01), Davis, Jr. et al.
patent: 4686826 (1987-08-01), Koshoffer et al.
Oates, Gordon C. "The Aerodynamics of Aircraft Gas Turbine Engines" AFAPL-TR-78-52.
"The Aerothermodynamics of Aircraft Gas Turbine Engines" by Gordon C. Oates, report AFAPL-TR-78-52, Wright-Patterson Air Force Base, Ohio, chapter 21, Afterburners by E. E. Zukoski, California Institute of Technology.

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