Process for cooling a turbine blade trailing edge
First Claim
1. A process for cooling a trailing edge of a turbine airfoil comprising the steps of:
- passing cooling air through a mid-chord region of the airfoil;
metering cooling air from the mid-chord region through the trailing edge region;
discharging a layer of film cooling air onto a pressure side surface of the trailing edge of the airfoil;
drawing in a portion of the film cooling air inside the airfoil to cool a trailing edge tip of the airfoil; and
,discharging the drawn in cooling air out the trailing edge of the airfoil.
3 Assignments
0 Petitions
Accused Products
Abstract
A turbine airfoil with a trailing edge cooling circuit that includes a row of pressure side bleed channels connected to a metering and impingement cooling circuit that discharges a layer of film cooling air out through a row of exit slots that open onto a pressure side wall of the trailing edge to provide cooling for the trailing edge region of the airfoil. Formed within the trailing edge tip is a vortex flow chamber extending the length of the airfoil and connected to the bleed channels by a row of inlet holes to draw a portion of the film cooling air into the vortex chamber to provide cooling for the trailing edge tip and to prevent the film cooling layer from breaking off from the pressure side wall. The vortex chamber is connected to a row of exit holes offset from the inlet holes to form the vortex flow and to discharge the vortex flowing cooling air out the trailing edge in a direction parallel to the suction side wall.
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Citations
5 Claims
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1. A process for cooling a trailing edge of a turbine airfoil comprising the steps of:
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passing cooling air through a mid-chord region of the airfoil; metering cooling air from the mid-chord region through the trailing edge region; discharging a layer of film cooling air onto a pressure side surface of the trailing edge of the airfoil; drawing in a portion of the film cooling air inside the airfoil to cool a trailing edge tip of the airfoil; and
,discharging the drawn in cooling air out the trailing edge of the airfoil. - View Dependent Claims (2, 3, 4, 5)
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Specification