Low turbulence flame holder mount

A low turbulence, close-coupled mounting structure for a flame holder disposed in an afterburner section of a gas turbine engine, said afterburner section having a plurality of angularly spaced, radially extending fuel injection nozzles surrounded by fairings;

• said mounting structure comprising:
• a first recessed portion formed in each said fairing;
• said flame holder having a first cross-sectional configuration and said first recessed portions having a second cross-sectional configuration substantially corresponding to a portion of said first cross-sectional configuration of said flame holder;
• means for releasably securing said flame holder is selected ones of said first recessed portions of said fairings.

A gas turbine engine having an afterburner section for increasing the energy level of a hot gas stream flowing through said afterburner section, said afterburner section including:

• an outer casing;
• a plurality of first and second elongated fuel injectors extending radially inward from said outer casing and spaced alternately around said casing;
• first and second fairings surrounding respective ones of said first and second fuel injectors for forming open ended heat shields about respective fuel injectors, said first fairings having a first length and said second fairings having a second length longer than said first length;
• a first substantially annular V-shaped flame holder having a gutter contour, a first cross-sectional configuration, and a first radius, and a second substantially annular V-shaped flame holder having a gutter contour, a second cross-sectional configuration, and a second radius, said second radius being smaller than said first radius;
• said first and second fairings having a first recessed portion formed therein at a first distance from said outer casing, said first recessed portions having a cross-sectional configuration substantially corresponding to a portion of said first cross-sectional configuration of said first flame holder, for receiving said first flame holder therein;
• said second fairings further including a second recessed portion formed therein at a second distance from said outer casing greater than said first distance, said second recessed portions having a cross-sectional configuration substantially corresponding to a portion of said second cross-sectional configuration of said second flame holder, for receiving said second flame holder therein;
• and
• means for securing said first flame holder in said first recessed portions of said second fairings, and for securing said second flame holder in said second recessed portions of said second fairings, each said first and second flame holder having an apex facing upstream in said afterburner section, and inner and outer skirts extending from said apex;
• and
• said securing means including pairs of aligned apertures in said inner and outer skirts of said first and second flame holders corresponding to respective first and second recessed portions of said fairings, said securing means further including a rod, and a pin disposed on a distal end of said rod, said rod being disposed in said selected ones of said fairings to position said pin in said pair of aligned apertures of said flame holder skirts to hold said first and second flame holders in respective first and second recessed portions.

A gas turbine engine afterburner section, comprising:

• a plurality of radially inwardly extending fuel injectors surrounded by fairings;
• at least one flame holder having a first cross-sectional configuration;
• said fairings having a first recessed portion formed in the downstream side of said fairings, said first recessed portions having a second cross-sectional configuration substantially corresponding to a portion of said first cross-sectional configuration of said flame holder for receiving said flame holder therein;
• said fairing having a substantially elliptical airfoil-type shaped outer contour and includes a heat shield portion, and at least two cover portions attached on the downstream side of said heat shield portion, said at least two cover portions being radially spaced from each other with the edges thereof defining said first recessed portion in the downstream side of each fairing;
• and means for securing said flame holder in selected ones of said first recessed portions of said fairings.

A gas turbine engine afterburner section, comprising:

• a plurality of radially inwardly extending fuel injectors surrounded by fairings;
• at least one flame holder having a first cross-sectional configuration;
• said fairings having a first recessed portion formed therein, said first recessed portions having a second cross-sectional configuration substantially corresponding to a portion of said first cross-sectional configuration of said flame holder for receiving said flame holder therein;
• said first cross-sectional configuration of said flame holder and said second cross-sectional configurational configuration of said first recessed portions comprise a substantially V-shaped gutter contour, with the apex thereof facing upstream in said after burner section;
• said flame holder having inner and outer skirts extending from said apex, and said securing means includes pairs of aligned apertures in said inner and outer skirts corresponding to said selected ones of said first recessed portions of said fairings;
• and said securing means includes pin means, extending through each said pair of aligned apertures of said flame holder skirts, for holding said flame holder in said first recessed portions;
• and means for securing said flame holder in selected ones of said first recessed portions of said fairings.

A gas turbine engine afterburner section, comprising:

• a plurality of radially inwardly extending fuel injectors surrounded by fairings;
• at least one flame holder having a first cross-sectional configuration;
• said fairings having a first recessed portion formed therein, said first recessed portions having a second cross-sectional configurations substantially corresponding to a portion of said first cross-sectional configuration of said flame holder for receiving said flame holder therein;
• said fuel injectors and said fairings comprising first fuel injectors and respective first fairings having a first length and second fuel injectors and respective second fairings having a second length longer than said first length, said first recessed portions of said first and second fairings being spaced a first distance from the outermost end of said fairings, and including:
• a second flame holder having a second cross-sectional configurational configuration;
• second recessed portions formed in said second fairings and radially spaced from said first recessed portions of said second fairings, said second recessed portions having a cross-sectional configuration substantially corresponding to a portion of said cross-sectional configuration of said second flame holder;
• and means for securing said second flame holder in selected ones of said second recessed portions;
• and means for securing said flame holder in selected ones of said first recessed portions of said fairings.