Impact gas film heat exchange structure based on prismatic protrusions
A heat exchange structure, prismatic technology, applied in the direction of blade support components, machines/engines, mechanical equipment, etc., can solve the problems of insufficient cooling effect on the outer surface of the blade, weakened heat transfer, etc., to improve the impact heat transfer effect , good heat transfer characteristics, and the effect of improving the cooling effect
Pending Publication Date: 2022-06-24
NORTHWESTERN POLYTECHNICAL UNIV
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Problems solved by technology
These structures can enhance gas turbulence and local turbulence to a certain extent, thereby improving the impact cooling effect on the boss, but because the speed direction of the cold air impacts on the boss is changed to the transverse direction, resulting in a slight weakening of the heat transfer in the area outside the boss , in general, the cooling effect of the boss on the outer surface of the blade is not obvious enough
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[0035] The embodiments described below with reference to the accompanying drawings are exemplary, and are intended to explain the present invention and should not be construed as limiting the present invention.
[0036] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", " rear, left, right, vertical, horizontal, top, bottom, inside, outside, clockwise, counterclockwise, etc., or The positional relationship is based on the orientation or positional relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, Therefore, it should not be construed as a limitation of the present invention.
[0037] see Fi...
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Abstract
The invention discloses an impact gas film heat exchange structure based on prismatic protrusions, and belongs to the technical field of impact gas film cooling of aero-engine turbine blades. Comprising an air inlet cavity, an impact plate and an impact target plate, and further comprises a prismatic protrusion and an air film hole which are formed in the surface of the impact target plate, and the prismatic protrusion and an impact hole in the impact plate are oppositely arranged; cooling gas is vertically shot to the prismatic protrusions of the impact target plate through the impact holes, flows towards the periphery along the side faces of the prismatic protrusions, conducts enhanced heat exchange on the impact target plate and then flows out of the gas film holes. Compared with a conical boss, the impact heat exchange structure of the prismatic protrusion is good in cold air flow adherence, the high heat exchange area is large, and the overall heat exchange effect of the target plate can be improved.
Description
technical field [0001] The invention belongs to the technical field of aero-engine turbine blade impingement air film cooling, in particular to an impingement air film heat exchange structure based on prismatic protrusions. Background technique [0002] For a turbine engine, increasing the turbine inlet gas temperature is of great significance to improve the engine performance, and the turbine inlet gas temperature is limited by the temperature resistance of the turbine material. At present, the inlet gas temperature of aero-engine turbines has reached 2000K, which is far beyond the temperature resistance limit of high-temperature resistant blade materials. Therefore, effective cooling measures must be taken to reduce the temperature of the turbine blades to ensure the safe and reliable operation of the turbine blades. [0003] Commonly used turbine blade cooling forms are divided into internal cooling and external cooling. In the internal cooling technology, the impact hea...
Claims
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Login to View More IPC IPC(8): F01D5/18
CPCF01D5/186
Inventor 刘存良冉媛李洁博张丽郭涛
Owner NORTHWESTERN POLYTECHNICAL UNIV