Fuel injector for a ramjet working at high Mach number

摘要

A fuel injector for a ramjet engine on an aircraft designed to travel at high Mach numbers, e.g. Mach 12 - 15, made to deliver a flow of fuel to a combustion chamber, consists of a body (10) and a bow (7) made from a carbon/carbon composition material. The body has a leading edge (16) forming an angle of about 15 degrees, partially cut away to form a flat face (17). The bow (11) is made from a thin layer of carbon/carbon composition material and has a leading edge (11A) with a radius of curvature of up to 2 mm. The material has a woven fibrous structure and a matrix of pyrolysed tar and graphite. The bow (11) is fixed and sealed to the body of the injector so that it forms a sealed inner chamber with a system (23, 27) for injecting a coolant fluid through jets in the face (17). After impacting against the inner surface of the skin the coolant fluid is evacuated through an outlet system (28, 29, 30).