Patent ID: 7360434
Filing Date: 2008-04-22
Classification: F01D,F05D

Abstract:
1. A process for measuring a pressure in a film cooling hole of a turbine airfoil, the turbine airfoil having an internal cooling air circuit and a plurality of film cooling holes, the process comprising the steps of: Securing the turbine airfoil to a test stand; Applying pressure and air flow to the turbine airfoil such that cooling air flows out the film cooling holes; Placing a probe tip with a flexible tip end over one of the film cooling holes to seal the hole; Observing a pressure rise rate of the selected hole; If the pressure rise rate is slow, then re-seal the flexible probe tip over the selected hole until the pressure rise rate is not slow; Recording the pressure level of the selected hole when the pressure readings for the selected hole is stable; and, Placing the flexible probe tip over another hole to measure the pressure rise rate of the newly selected hole.