| 主权项 |
1. An annular seal assembly configured, in use, to surround a turbine adjacent to turbine blades of the turbine, the annular seal assembly comprising a plurality of seal segments;
each of the plurality of seal segments of the annular seal assembly having an abradable coating on an inboard surface thereof, the abradable coating arranged, in use, for contact with tips of the turbine blades and having an axially upstream edge and an axially downstream edge; a plurality of rows of effusion cooling ducts extending from an outboard surface of a respective seal segment of the plurality of seal segments, through the respective seal segment and the abradable coating; each effusion cooling duct of the plurality of rows of effusion cooling ducts opening into one of a plurality of grooves formed in an inboard surface of the abradable coating, each of the grooves in the plurality of grooves extending predominantly in a circumferential direction around the annular seal assembly, a mouth of each groove of the plurality of grooves opening towards the turbine blades not being narrower than an inner end of the groove and the plurality of grooves lying in a parallel orientation relative to one another in an array which extends from the axially upstream edge to the axially downstream edge. |
