TURBINE AIRFOIL COOLING SYSTEM WITH CHORDWISE EXTENDING SQUEALER TIP COOLING CHANNEL

摘要

A kind of turbogenerator (14) of the aerofoil (12) of internal cooling system (10), thus cooling system (10) includes the radially-inwardly Tip squealer tip (18) of the cooling duct (16) of tangential extension and is at least partially formed in be had by the outer surface (22) of inner wall (20) and non-linear is disclosed. The tip cooling duct (16) of the tangential extension of the inner wall (20) of non-linear outer surface (22) can by pressure and sucking side section (24,26) closer to that intersect at a point (74) inner surface (30) outer wall (32) is formed at least part squealer tip (18) than other aspects on the pressure side with suck side section (22) 0 part (22) 1. The pressure of the configuration and sucking side section (24,26) reduce flow section, accelerate the tangential cooling duct of cooling fluid stream at the tip (16) of tangential extension and guide cooling fluid to pressure and suction side outer wall (34,36) to improve cooling efficiency.