Electrostatic afterburner light-off detector

Details Electrostatic afterburner light-off detector Electrostatic afterburner light-off detector

1982-12-28

1986-07-08

Heyman, John S.

60 39091, 60 39821, F02C 7262

Patent

active

045995680

ABSTRACT:
A light-off detector for an afterburner of a gas turbine jet engine comprises an afterburner flameholder (24) electrically insulated (70) from an attached igniter (38) and insulated from other engine parts by means of non-electrically-conductive support rods (30, 45) or by means of electrically conductive rods (30) insulated (50, 52) from the engine case (12) and insulated (70) from an attached igniter (38). An electrical connection (54) brought through the engine case connects the flameholder to a resistor (57) through a bias battery (56). Ionic current flow resulting from flame causes a Schmidt trigger (60) to provide a light-off signal, A/B LIT (62).

REFERENCES:
patent: 3469398 (1969-09-01), Schafer
patent: 3886351 (1975-05-01), Williams

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