IMPINGEMENT COOLING MECHANISM, TURBINE BLADE AND CUMBUSTOR

• US 20140290257A1
• Filed: 06/12/2014
• Published: 10/02/2014
• Est. Priority Date: 12/15/2011
• Status: Active Grant

• Current Assignee: IHI Corporation
• Original Assignee: IHI Corporation
• Inventors: OKITA, Yoji, FUJIMOTO, Shu, NAKAMATA, Chiyuki
• Granted Patent: US 9,957,812 B2
• Time in Patent Office: Days
• US Class Current: 60/752
• CPC Class Codes: F01D 5/187 Convection cooling
• CPC Class Codes: F01D 5/189 the insert having a tubular cross-section, e.g. airfoil shape
• CPC Class Codes: F05D 2250/241 spherical
• CPC Class Codes: F05D 2250/294 grooved
• CPC Class Codes: F05D 2260/201 by impingement of a fluid
• CPC Class Codes: F05D 2260/2212 by creating turbulence vortex generators, turbulators or the like for mixing F05D2240/127
• CPC Class Codes: F23R 2900/03042 Film cooled combustion chamber walls or domes
• CPC Class Codes: F23R 2900/03044 Impingement cooled combustion chamber walls or subassemblies
• CPC Class Codes: F23R 2900/03045 Convection cooled combustion chamber walls provided with turbolators or means for creating turbulences to increase cooling
• CPC Class Codes: F23R 3/002 Wall structures F23R3/02 and F23R3/007 take precedence
• CPC Class Codes: F23R 3/005 Combined with pressure or heat exchangers

Abstract

The present invention relates to an impingement cooling mechanism (1) that ejects a cooling gas (G) toward a cooling target (2) from a plurality of impingement holes (4) formed in an opposing member (3) that is arranged opposite the cooling target (2). Turbulent flow promoting portions (6) are provided in the flow path of a crossflow (CF), which is a flow that is formed by the cooling gas (G) after being ejected from the impingement holes (4). The turbulent flow promoting portions (6) are constituted so that a turbulent flow is promoted from the upstream side to the downstream side of the crossflow (CF).

Claims

1. An impingement cooling mechanism that ejects a cooling gas toward a cooling target from a plurality of impingement holes formed in an opposing member that is arranged opposite the cooling target,

wherein turbulent flow promoting portions are provided in the flow path of a crossflow, which is a flow that is formed by the cooling gas after being ejected from the impingement holes;

and

the turbulent flow promoting portions are constituted so that a turbulent flow is promoted from the upstream side to the downstream side of the crossflow.

2. The impingement cooling mechanism according to claim 1, wherein the turbulent flow promoting portions are arranged on the upstream side of the crossflow with respect to the impingement holes.

3. The impingement cooling mechanism according to claim 1, wherein the number of the impingement holes per unit area is provided so as to be relatively numerous on the upstream side of the crossflow, and relatively few on the downstream side thereof.

4. The impingement cooling mechanism according to claim 1, wherein the turbulent flow promoting portions are provided on the cooling target side of the impingement cooling mechanism

5. The impingement cooling mechanism according to claim 1, wherein the turbulent flow promoting portions have a bump shape.

6. The impingement cooling mechanism according to claim 1, wherein film holes are opened in the cooling target.

7. A turbine blade comprising the impingement cooling mechanism according to claim 1.

8. A combustor comprising the impingement cooling mechanism according to claim 1.