Blades
AssigneeROLLS-ROYCE plc
InventorsSTEPHEN C. DIAMOND, CANER H. HELVACI, RODERICK M. TOWNES, IAN TIBBOTT, DOUGAL R. JACKSON
Life of this patent
Estimating the term…
Abstract
A turbine blade (40) for a gas turbine engine has an aerofoil portion (42) extending from a root (48) to a tip (54). The tip (54) carries winglets (56, 58). A gutter (62) extends across the tip (54) to entrain gas leaking around the tip (54) (over tip leakage). The aerofoil portion (42) has a mean camber line and the gutter (62) has a centre line. In the examples described, the conditions that (a) the mean camber line and the centre line coincide at the exit when viewed from the tip towards the root, and (b) the mean camber line and the centre line are parallel at the exit when viewed as aforesaid, are not both fulfilled.
Claims10
A rotor blade having an aerofoil portion with a leading edge, a trailing edge, a tip and a root, there being at least one gutter extending across the tip to an exit in the region of the trailing edge, the aerofoil portion having a mean camber line, and the gutter having a centre line when viewed from the tip towards the root, and the blade being configured to the conditions that (a) the mean camber line and the centre line coincide at the exit when viewed as aforesaid, and (b) the mean camber line and the centre line are parallel at the exit when viewed as aforesaid, are not both fulfilled.
Dependencies are inferred from the claim text.