Turbulent baffle heat transfer enhancing device with jet impingement function

A technology of jet impact and enhanced heat transfer, which is applied in the direction of blade support components, engine components, machines/engines, etc., can solve the problems of not being able to satisfy the closed circulation of cooling medium, narrow area space, complex structure, etc., and achieve closed Circulation requirements, uniform temperature distribution, good heat transfer effect

Inactive Publication Date: 2009-11-25
INST OF ENGINEERING THERMOPHYSICS - CHINESE ACAD OF SCI
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AI Technical Summary

Problems solved by technology

For the cooling of the trailing edge of the turbine blade, due to the narrow space in this area, the method of arranging small short ribs or cylindrical ribs is usually used to turbulence and enhance heat transfer, but this structure is relatively complicated and cannot meet the requirements of closed cooling medium cooling. cycle requirements

Method used

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  • Turbulent baffle heat transfer enhancing device with jet impingement function

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Embodiment Construction

[0010] like figure 1 As shown, it is a schematic diagram of the cooling structure of the turbulent baffle with jet impact effect and the flow path of the cooling medium applied to the trailing edge of the turbine blade according to the present invention. In the internal cavity of the turbine blade trailing edge part 10, along the span direction, the partition plate 1 is divided into two parts, one part is channel A, and the other part is channel B, the width of channel A is greater than the width of channel B, two channels A, B is provided with openings at the upper ends of the blades, separated by partitions 1, one is the inlet 3 of passage A, and the other is the outlet 4 of passage B, and passages A and B communicate at the tail end 5 of the blades. A plurality of baffles 2 are arranged in the inner cavity of the passage A in a direction perpendicular to the spanning direction, and the plurality of baffles 2 are arranged parallel to each other alternately to form a serpenti...

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Abstract

The invention discloses a turbulent baffle heat transfer enhancing device with jet impingement function, and relates to the heat transfer technology. The heat transfer enhancing structure with impingement and turbulence functions utilizes a zigzag channel arranged along a blade expanding direction, controls the section surface of a circulation part by regulating a baffle structure in the channel to achieve the aim of enhancing heat transfer, and is suitable to be arranged on a trailing edge of a turbine blade of a gas turbine with narrow space and high heat load to form a closed cooling structure. The jet baffle turbulent structure of the invention has simple structure and high heat exchange capacity, can meet the cooling requirement of the trailing edge of the turbine blade of the gas turbine through high-efficiency impingement cooling function, and can effectively cool the high-temperature trailing edge of the turbine blade on the premise of closed cycle of a cooling medium, reduce mixing loss caused by cooling, and make the temperature on the trailing edge of the blade distributed more evenly compared with other open cooling structures applied to the trailing edge of the turbine blade.

Description

technical field [0001] The invention relates to a spoiler baffle enhanced heat transfer device with an impact effect, which is developed for the characteristics of narrow space and high heat load at the trailing edge of the turbine blade of a gas turbine, and is used to arrange at the trailing edge of the turbine blade to meet the requirements While the cooling of the turbine blade trailing edge area is required, the closed cooling requirements are realized. Background technique [0002] The serpentine channel cooling structure is widely used in the cooling of gas turbine turbine blades. By reasonably adjusting the cross section of the flow channel and increasing the turbulence, a local ribbed serpentine channel structure is formed, but this structure is generally arranged along the chord direction of the blade ( The cooling medium flows along the blade span direction), mainly relying on the rib structure to enhance heat transfer, and is used for cooling the middle area of ​...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F01D5/18
Inventor 刘建军胡捷苏生
Owner INST OF ENGINEERING THERMOPHYSICS - CHINESE ACAD OF SCI
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