Patent attributes
A turbine assembly having a hollow aerofoil, an impingement tube, and an impingement tube sleeve. The sleeve has as least one impingement tube sleeve segment, the aerofoil having at its interior surface longitudinal ribs extending from a leading edge towards a trailing edge. A first impingement tube sleeve segment provides a slotted flow blocker at a surface of the first impingement tube sleeve segment, the first impingement tube sleeve segment inserted into the hollow aerofoil such that the ribs of the hollow aerofoil engage with corresponding slots of the slotted flow blocker and such that the surface of the first impingement tube sleeve segment rests on the ribs. The impingement tube is inserted into the hollow aerofoil such that the at least one impingement tube sleeve segment is arranged between the interior surface of the hollow aerofoil and an exterior surface of the impingement tube.
