Enhanced cooling S-shaped folded plate impact cooling structure

Abstract

The invention discloses an S-shaped folded plate impingement cooling structure for enhanced cooling, relates to the technical field of turbine blade cooling, and solves the problems that the cooling performance is obviously reduced and the flow resistance is increased due to the use of an impingement array in the prior art. The device comprises an S-shaped folded plate, a plurality of air inlet sections and a plurality of air outlet sections are arranged on the S-shaped folded plate, and the air inlet sections and the air outlet sections are alternately arranged; the air outlet section is of a groove structure and is arranged on the surface of one side of the S-shaped folded plate. The air inlet section comprises an air inlet groove and a plurality of guide holes. The air inlet groove is formed in the side, opposite to the air outlet section, of the S-shaped folded plate. A plurality of guide holes are formed in the bottom of the air inlet groove. The S-shaped broken line jet impingement plate capable of reducing the influence of transverse flow is adopted to reduce the momentum of transverse flow at the downstream impingement jet, and interference and deflection on the jet are reduced; vortex pairs are induced to be generated through the arranged air outlet section to block transverse flow, the influence of transverse flow in the cold air cavity is reduced, and then the cooling efficiency of laminate cooling is improved, and the flow resistance is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of turbine blade cooling, and particularly to an S-shaped folded plate impingement cooling structure with enhanced cooling. Background Art

[0002] Crossflow is an important factor affecting the cooling performance of impinging jet arrays. The crossflow of the exhaust gas from the upstream jets always interferes with and deflects the downstream jets in the array, resulting in a reduction in the heat transfer intensity. This negative effect of crossflow is a limiting factor for the length of the jet impingement array. However, for turbine blades with a high heat load, the prior art often uses impingement arrays, which leads to a significant reduction in cooling performance and an increase in flow resistance. Summary of the Invention

[0003] In order to solve the problems in the prior art mentioned above, namely, the significant reduction in cooling performance and the increase in flow resistance caused by the use of impingement arrays, the present invention hereby provides an S-shaped folded plate impingement cooling structure with enhanced cooling. The present invention uses an S-shaped broken-line jet impingement plate that reduces the influence of crossflow to reduce the momentum of the crossflow at the downstream impinging jets and reduce the interference and deflection on the jets.

[0004] The present invention provides an S-shaped folded plate impingement cooling structure with enhanced cooling, which specifically includes an S-shaped folded plate. The S-shaped folded plate is provided with an intake section and an outlet section, which are alternately arranged; the outlet section is a groove structure and is arranged on one side surface of the S-shaped folded plate.

[0005] Furthermore, the intake section includes an intake groove and a plurality of guiding holes. The intake groove is arranged on the side of the S-shaped folded plate opposite to the outlet section; a plurality of guiding holes are arranged at the bottom of the intake groove.

[0006] Furthermore, the cross-section of the intake groove is rectangular.

[0007] Furthermore, the width of the outlet section at the upper edge position of the S-shaped folded plate is smaller than the width of the outlet section at the middle position.

[0008] Furthermore, the cross-section of the outlet section is rectangular.

[0009] The beneficial effects of the S-shaped folded plate impingement cooling structure with enhanced cooling according to the present invention are as follows: (1) For the S-shaped folded plate impingement cooling structure with enhanced cooling according to the present invention, the outlet section is provided to induce the generation of vortex pairs to hinder the crossflow and reduce the influence of the crossflow in the cold air cavity, thereby increasing the cooling efficiency of the laminated plate cooling and reducing the flow resistance; the flow resistance of the S-shaped jet impingement plate decreases with the weakening of the crossflow intensity, especially when the impingement distance is small; the film arrangement method of the S-shaped jet impingement plate of the present invention obtains more uniform heat transfer on the target surface, and the structure is simple and easy to process. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] The drawings forming a part of this application are used to provide a further understanding of the present invention. The schematic embodiments and descriptions thereof of the present invention are used to explain the present invention and do not constitute an improper limitation to the present invention.

[0011] In the drawings: Figure 1 is a three-dimensional structural schematic diagram of an S-shaped folding plate impingement cooling structure with enhanced cooling according to the present invention; Figure 2 is a sectional view of an S-shaped folding plate impingement cooling structure with enhanced cooling according to the present invention; Wherein: 1 - intake section; 2 - guiding hole; 3 - outlet section; 4 - sectional line position. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0012] The technical solutions of the present invention will be clearly and completely described below in conjunction with the drawings. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of them. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0013] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be understood as a limitation to the present invention. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0014] In the description of the present invention, it should be noted that unless otherwise clearly specified and defined, the terms "installed", "connected", "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0015] In addition, the technical features involved in different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0016] Specific Embodiment 1: Refer to Figure 1 - Figure 2Specifically describe this embodiment. A strengthened cooling S-shaped baffle impingement cooling structure described in this embodiment specifically includes an S-shaped baffle. Four intake sections 1 and five outlet sections 3 are arranged on the S-shaped baffle. The intake sections 1 and the outlet sections 3 are equidistantly arranged, and at the same time, the intake sections 1 and the outlet sections 3 are alternately arranged; the outlet section 3 is a groove structure with a rectangular cross-section, which is arranged on one side surface of the S-shaped baffle. By inducing vortex pairs in the flow channel through the outlet section 3, the cross-flow is hindered, and the influence of the transverse flow in the cold air cavity is reduced, thereby increasing the cooling efficiency of the lamellar cooling and reducing the flow resistance.

[0017] The intake section 1 includes an intake groove and eight guiding holes 2. The cross-section of the intake groove is rectangular. The intake groove is arranged on the side of the S-shaped baffle opposite to the outlet section 3. The intake groove and the outlet section 3 are alternately arranged up and down on different sides of the S-shaped baffle, so that an S-shaped bending structure is formed inside the S-shaped baffle, as Figure 2 shown; eight guiding holes 2 are arranged at the bottom of the intake groove to change the air flow into a jet flow. The guiding holes 2 are arranged in a 4×8 pattern to ensure sufficient and uniform jet cold air enters.

[0018] The width of the outlet section 3 at the upper edge position of the S-shaped baffle is smaller than the width of the outlet section 3 at the middle position.

[0019] The specific working process of a strengthened cooling S-shaped baffle impingement cooling structure described in the present invention is as follows: During operation, air flow is introduced through the intake section 1; the guiding holes 2 are used to change the air flow into a jet flow; the S-shaped cooling section is used to guide the air flow to the outlet section 3 to reduce the transverse air flow. By inducing vortex pairs in the flow channel through the outlet section 3, the cross-flow is hindered, and the influence of the transverse flow in the cold air cavity is reduced, thereby increasing the cooling efficiency of the lamellar cooling and reducing the flow resistance.

[0020] Summarizing the above embodiments, for a strengthened cooling S-shaped baffle impingement cooling structure described in the present invention, by setting the outlet section 3 to induce vortex pairs to hinder the cross-flow and reduce the influence of the transverse flow in the cold air cavity, the cooling efficiency of the lamellar cooling is increased and the flow resistance is reduced; the flow resistance of the S-shaped jet impingement plate decreases as the cross-flow intensity weakens, especially when the impingement distance is small; the film arrangement method of the S-shaped jet impingement plate of the present invention obtains more uniform heat transfer on the target surface, and the structure is simple and easy to process.

[0021] For the specific embodiments described above, the purpose, technical solutions and beneficial effects of the present invention are further described in detail. It should be understood that the above are only specific embodiments of the present invention and are not used to limit the invention. It can also be a reasonable combination of the features recorded in the above embodiments. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An S-shaped baffle impingement cooling structure with enhanced cooling, characterized in that: It includes an S-shaped folding plate, and a number of air inlet sections (1) and a number of air outlet sections (3) are arranged on the S-shaped folding plate, and the air inlet sections (1) and the air outlet sections (3) are arranged alternately; the air outlet section (3) is a groove structure and is arranged on one side surface of the S-shaped folding plate.

2. The enhanced cooling S-shaped baffle impact cooling structure according to claim 1, wherein: The air inlet section (1) includes an air inlet groove and a number of guide holes (2), the air inlet groove is arranged on the side of the S-shaped folding plate opposite to the air outlet section (3); a number of guide holes (2) are arranged at the bottom of the air inlet groove.

3. The enhanced cooling S-shaped baffle impingement cooling structure according to claim 2, wherein: The cross-section of the air inlet groove is rectangular.

4. The enhanced cooling S-shaped baffle impingement cooling structure according to claim 1, characterized in that: The width of the air outlet section (3) at the upper edge position of the S-shaped folding plate is smaller than the width of the air outlet section (3) at the middle position.

5. The enhanced cooling S-shaped corrugated plate impingement cooling structure according to claim 4, characterized in that: The cross-section of the air outlet section (3) is rectangular.

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