FRONT PART OF GAS TURBINE ENGINE, GAS TURBINE ENGINE AND FOREIGN MATTERS REFLECTION SYSTEM PROVIDED IN GAS TURBINE ENGINE Russian patent published in 2012 - IPC F02C7/52 

FIELD: engines and pumps.

SUBSTANCE: front part of gas turbine engine includes inner support attachment ring of outlet guide vanes of fan, flow separation nose from which primary annular channel and secondary annular channel of gas turbine engine begin. In addition, front part of gas turbine engine includes at least one reflection system intended to prevent/restrict the penetration of foreign matters, such as hail-stones, inside the above primary channel of gas turbine engine. Reflection system contains at least one reflection surface, as well as actuator allowing to move the reflection surface from closed position to developed position. Actuator is made from alloy with shape memory effect so that when it achieves this transient temperature that makes it obtain the shape stored in memory, it can move the reflection surface to developed position providing the reflection of foreign matters. Besides, reflection system includes elastic return means allowing to return the reflection surface to its closed position at the temperature of the above actuator, which is less than the above transient temperature. Reflection system is installed on inner support attachment ring of outlet guide vanes of fan so that rear end of reflection surface, when in developed position, can be arranged in front of flow separation nose.

EFFECT: higher efficiency of prevention, restriction of penetration of foreign matters, such as hail-stones, inside primary channel of gas turbine engine, restriction or rejection of backward displacement of primary and secondary flow separation nose.

19 cl, 4 dwg