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Air film cooling effect orthogonality prediction method based on multi-parameter influences

A technology of air film cooling and cooling effect, which is applied in the direction of supporting components of blades, engine components, machines/engines, etc., can solve the problems of cooling effect research, which has not been researched, and reduce the probability of large errors and accurate prediction results Effect

Inactive Publication Date: 2014-10-08
NORTHEAST DIANLI UNIVERSITY
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Problems solved by technology

At present, most studies focus on the influence of one or two parameters on the cooling effect, and have not studied the cooling effect under the joint action of three or more parameters, and the order of the influencing factors has not been studied.

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  • Air film cooling effect orthogonality prediction method based on multi-parameter influences
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  • Air film cooling effect orthogonality prediction method based on multi-parameter influences

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specific Embodiment

[0085] The multi-parameter-based orthogonal prediction method for film cooling of the present invention takes three factors, each of which takes three levels as an example, to study the cooling effect of the turbine's first stage vane. Flat-plate film cooling is the basis for studying complex flow problems. In order to simplify the calculation, a flat-plate is used instead of a blade to study the cooling efficiency. When studying the cooling effect of three factors and three levels, the traditional method needs 27 tests, and the orthogonal method only needs 9 tests to obtain the optimal blade cooling mode, which can greatly save working time.

[0086] (1) Choose the three factors of blowing ratio, hole type and turbulence degree that have a great influence on the cooling effect of the first stage vane for research. % and 30%, the hole type is selected from slotted sister holes, sister holes and slotted cylindrical holes, such as figure 2 , 3 , 4 are the three-dimensional sc...

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Abstract

The invention discloses an air film cooling effect orthogonality prediction method based on multi-parameter influences. The method is characterized by comprising the steps that turbine blade cooling effect influence factors are selected; experiments are arranged according to an orthogonal table, an experiment plan is made, and the experiments are carried out; experiment results are visually analyzed, and optimal production conditions are obtained; variance analysis is carried out on the experiment results, differences between the experiment results caused by factor level changes and differences between the experiment results caused by error fluctuations are distinguished, and an optimal scheme is obtained through the minimum experiment frequency. The method is easy to implement, the probability that larger errors may appear in the study process is reduced, and the prediction result is more accurate.

Description

technical field [0001] The invention relates to the technical field of film cooling in turbine power devices, in particular to an orthogonal prediction method based on the effect of film cooling under the influence of multiple parameters, which is suitable for turbine blades exposed to high temperature environments and need to be cooled. Background technique [0002] The thermal efficiency of a gas turbine increases with the initial gas temperature. Modern gas turbine designs operate at very high inlet temperatures, well beyond the temperature limits of current materials, limited by the high temperature resistance of component materials, and require effective cooling of the material surfaces. Researching and improving gas turbine cooling technology to reduce the operating temperature of high-temperature components and prolong the service life of metal materials is an important means to improve the safety of gas turbines. [0003] Cooling of gas turbines is generally achieve...

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Application Information

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IPC IPC(8): F01D5/08
Inventor 张玲祝健郭瑞红张毅张智达关跃波
Owner NORTHEAST DIANLI UNIVERSITY