Gas Turbine Engine Seals and Engines Incorporating Such Seals

A gas turbine engine seal comprising:

• a first gas turbine engine component;
• a second gas turbine engine component;
• and
• an annular seal body forming a seal between the first component and the second component, the seal body extending between a first axial end and a second axial end, the seal body exhibiting a first sealing surface at the first end, a second sealing surface at the second end, and a third sealing surface, the seal body having an annular opening providing access to an annular cavity of the seal body;
• the first gas turbine engine component, the second gas turbine engine component and the seal body defining a higher pressure side and a lower pressure side, the annular opening being positioned adjacent to the higher pressure side.

A gas turbine engine comprising:

• a radially inner, high pressure region;
• a radially outer, lower pressure region;
• and
• an annular seal positioned between the high pressure region and the lower pressure region, the seal having opposing axial sealing surfaces and an inner diameter sealing surface, the seal defining an annular cavity operative to communicate with the high pressure region such that pressure within the cavity tends to urge the axial sealing surfaces and the inner diameter sealing surface into contact with corresponding engagement surfaces of the gas turbine engine.