Seal assembly

A fuel injector arrangement for injecting fuel into a high temperature supersonic gas flow bounded by a wall, having an inner and outer side comprising:

• an elongated fuel injector extending through and substantially perpendicular to said wall;
• a seal carrier comprised of an inner plate, a central plate and an outer plate, said plates having inner faces and outer faces and edges and being parallel to each other and to said wall, and surrounding said injector;
• joining means for compressively joining said plates;
• an inner wedge seal between the edge of said inner and central plates adjacent said injector and in contact with said injector;
• a outer wedge seal between the edges of said outer and central plates adjacent said injector and in contact with said injector;
• said seal carrier countersunk in said wall from the outerside thereof;
• an inner face seal located on the inner face of said inner plate surrounding but spaced from said injector;
• an outer face seal located on said outer face of said outer plate surrounding but spaced from said injector;
• a cover plate sealingly secured to said wall and compressing said seal carrier inner and outer face seals;
• and
• a coolant flow path through said wall and into a plenum surrounding said seal carrier outside said face seals.