Afterburner and aircraft engine

Abstract

An aircraft engine includes an afterburner which has a flame stabilizer. The flame stabilizer maintains a flame generated from a mixed gas of a combustion gas and air. The flame stabilizer includes multiple gutters each configured to generate a flame stabilization area for the flame on its downstream side. Each gutter is formed from: a curved apex section having a stagnation point; and flat plate-shaped side surface sections integrally formed on the respective two sides of the apex section. Each gutter has a V-shaped cross-sectional shape which is opened to the downstream side. At least one through-hole is formed only in each side surface section of each gutter.

1 . An afterburner configured to increase thrust of an aircraft engine by burning a mixed gas of a combustion gas discharged from a core passage of the aircraft engine and air discharged from a fan passage of the aircraft engine again while supplying fuel to the mixed gas, the afterburner comprising:
 an outer duct provided to an outlet portion of an engine case of the aircraft engine;   a cylindrical liner provided inside the outer duct, and configured to allow the mixed gas to flow through the liner;   a fuel injector configured to inject the fuel into the liner;   an igniter configured to ignite the mixed gas including the fuel inside the liner; and   a flame stabilizer disposed in a rear of the fuel injector inside the liner, including a plurality of gutters arranged radially and each configured to form a flame stabilization area on a downstream side of the gutter, and configured to hold a flame, wherein   each gutter is formed from a curved apex section and flat plate-shaped side surface sections integrally formed on two sides of the apex section, and has a V-shaped cross- sectional shape which is opened to a downstream side of the gutter, and   at least one through-hole is formed only in each side surface section of the gutter.   
     
     
         2 . The afterburner according to  claim 1 , wherein a deceleration space for mixing and concurrently decelerating the mixed gas introduced through the at least one through-hole is defined inside the gutter. 
     
     
         3 . An aircraft engine configured to produce thrust by exhausting a mixed gas of a combustion gas and air in a rearward direction, comprising the afterburner according to  claim 1 .