Control of leakage for gas turbine engine compressor blades

A gas turbine engine comprising:

• a turbine section, a compressor section and a combustor;
• the compressor section having a compressor disk having a slot receiving a blade with an airfoil extending from a platform and the compressor disk having an upstream end and a downstream end;
• a cover plate at one of the upstream end and the downstream end, and covering an area between the blade and the compressor disk across a circumference of the compressor disk, the cover plate covering an area between an inner peripheral surface of the platform to a radially innermost end of the slot in the disk;
• the compressor disk having hooks, and there being a retention ring mounted in a cavity between the hooks and the compressor disk, with the cover plate mounted between the retention ring and the compressor disk, and said retention ring contacting at least one of the hooks, the retention ring retaining the cover plate against the compressor disk;
• wherein the cover plate has openings which pass over the hooks on the compressor disk;
• and
• wherein an anti-windage feature extends circumferentially between the openings in the cover plate and extends away from a face of the cover plate to be received in a circumferential gap between adjacent ones of the hooks.

A gas turbine engine comprising:

• a turbine section, a compressor section and a combustor;
• the compressor section having a compressor disk having a slot receiving a blade with an airfoil extending from a platform and the compressor disk having an upstream end and a downstream end;
• a cover plate at one of the upstream end and the downstream end, and covering an area between the blade and the compressor disk across a circumference of the compressor disk, the cover plate covering an area between an inner peripheral surface of the platform to a radially innermost end of the slot in the disk;
• the compressor disk having hooks, and there being a retention ring mounted in a cavity between the hooks and the compressor disk, with the cover plate mounted between the retention ring and the compressor disk, and said retention ring contacting at least one of the hooks, the retention ring retaining the cover plate against the compressor disk;
• wherein an anti-windage feature extends circumferentially between the openings in the cover plate and extends away from a face of the cover plate to be received in a circumferential gap between adjacent ones of the hooks;
• and
• wherein the cover plate has openings which pass over the hooks on the compressor disk.