Cooling circuit within a turbine nozzle and method of cooling a turbine nozzle
Inactive Publication Date: 2005-02-10
GENERAL ELECTRIC CO
View PDF14 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
The construction presents new issues within the stator components on how to efficiently use the improved steam or air cooling properties yet contain the high pressures and temperatures within the structure and still survive in the environment of the hot gas path.
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0011]FIG. 1 is a cross section through a turbine nozzle 10 showing the steam cooling circuit 12 of the present invention. Although the invention will be described in the context of a steam cooling circuit, those of ordinary skill in the art will appreciate that the circuit has the capability of running either on steam or air as the cooling medium.
[0012] The turbine nozzle internal structure includes a first cavity 14, termed cavity one, a second cavity 16, termed cavity two, and a third cavity 18, termed cavity three. The nozzle 12 also includes an outer band 20 and an inner band 22. The cooling circuit 12 of the present invention endeavors to effect cooling of the first, second and third cavities as well as the inner and outer bands to help increase turbine efficiency.
[0013] The cooling circuit 12 is preferably a closed loop cooling circuit for increased cooling efficiency.
[0014] A duct insert 24 is disposed within cavity two 16 and receives cooling medium flow via an inlet 26....
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
A cooling circuit is provided within a turbine nozzle to help increase turbine efficiency. The turbine nozzle includes first, second and third cavities, an outer band, and an inner band. The cooling circuit contains an inlet receiving cooling medium flow, and a first duct insert disposed in the second cavity. The first duct insert receives the cooling medium flow via the inlet and duct flows the cooling medium flow to a bottom of the second cavity. An impingement insert is disposed in the first cavity that receives the cooling medium flow from the first duct insert. A first impingement plate is disposed within the outer band defining an outer band cooling path within the outer band. The outer band cooling path receives the cooling medium flow from the first cavity. A second cavity cooling path is defined between the first duct insert and a second cavity wall, where the second cavity cooling path receives the cooling medium flow from the outer band cooling path. A second impingement plate is disposed within the inner band and defines an inner band cooling path within the inner band. The inner band cooling path receives the cooling medium flow from second cavity cooling path. Finally, a second duct insert is disposed in the third cavity and defines a third cavity cooling path between the second duct insert and a third cavity wall. The third cavity cooling path receives the cooling medium flow from the inner band cooling path.
Description
BACKGROUND OF THE INVENTION [0001] The present invention relates to a cooling circuit in a turbine nozzle and, more particularly, to a cooling circuit within a turbine nozzle that allows for optimum cooling of the nozzle while maintaining system integrity and life goals. [0002] Recent turbine designs are high output, high efficiency gas turbines utilizing steam or air cooling within several of the hot gas path components. The construction presents new issues within the stator components on how to efficiently use the improved steam or air cooling properties yet contain the high pressures and temperatures within the structure and still survive in the environment of the hot gas path. Base metal temperature, steam temperature rise, steam pressure, flow and geometry are a few of the considerations for ensuring a component life that meets program goals. BRIEF DESCRIPTION OF THE INVENTION [0003] In an exemplary embodiment of the invention, a closed loop cooling circuit is provided within a...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Applications(United States)
IPC IPC(8): F01D9/02F01D9/04F01D9/06F01D25/08
CPCF01D9/041F01D25/08F01D9/06
Inventor POTHIER, MICHAEL R.SEYMOUR, JOHN R.LEO, DAVID
Owner GENERAL ELECTRIC CO