초록 ▼

A passive feedback-controlled regulator and method for regulating gas turbine bleed air is provided, which automatically regulates the flow of coolant air directed to the turbine vanes, blades, and other hot section components based on the inherent differential pressure between the diffused compress

A passive feedback-controlled regulator and method for regulating gas turbine bleed air is provided, which automatically regulates the flow of coolant air directed to the turbine vanes, blades, and other hot section components based on the inherent differential pressure between the diffused compressor discharge pressure and the compressor impeller exit air. The differential pressure used to operate the regulator is a measure of the turbine mass flow rate, and, therefore is a measure of the instantaneous engine coolant flow requirement.

대표청구항 ▼

[ What is claimed is:] [1.] A turbine coolant flow control apparatus for use in a gas turbine engine having a coolant air bleed from a compressor section, said compressor section having a first and a second discharge path for providing coolant air, said first discharge path having a diffuser upstrea

[ What is claimed is:] [1.] A turbine coolant flow control apparatus for use in a gas turbine engine having a coolant air bleed from a compressor section, said compressor section having a first and a second discharge path for providing coolant air, said first discharge path having a diffuser upstream of a burner section for recovering a greater degree of velocity head than said second discharge path, said coolant flow control assembly comprising:a valve seat operatively disposed in said first discharge path;a valve means for restricting a first flow through said valve seat, said valve means being directly responsive to a pressure differential between said first flow in said first discharge path and a second flow in said second discharge path, said pressure differential varying with changes in engine load. [10.] A method of regulating cooling air flow in a turbine engine comprising:conveying a first portion of said cooling air flow to a first component to be cooled;conveying a second portion of said cooling air flow to a second component to be cooled;diffusing said first portion of said cooling air flow upstream of a burner section to recover a portion of a velocity head of said first portion of said cooling air flow to create a pressure differential between said first portion of said cooling air flow and said second portion of said cooling air flow, said pressure differential directly varying with changes in engine load; andmoving a valve member in response to said pressure differential to regulate said first portion of said cooling air flow. The method of claim 10, wherein:said first portion of said cooling air flow comprises compressor discharge exit air and said second portion of said cooling air flow comprises compressor impeller exit air.