Measurement correction method, device and equipment for blade grid air film cooling test and medium
A technology of film cooling and test pieces, which is applied in the direction of mechanical equipment, safety devices, blade support components, etc., can solve the problems of not properly correcting the model, disassembling and assembling, and not being able to accurately improve the adiabatic film cooling efficiency of the cascade, and achieve Avoid negative effects, accurately obtain the effect of avoiding a large number of repeated experiments
Pending Publication Date: 2022-03-08
SHANGHAI ELECTRICGROUP CORP
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Problems solved by technology
[0006] In view of the shortcomings of the prior art described above, the purpose of this application is to provide a measurement correction method, device, equipment and medium for cascade air film cooling test, which is used to solve the problem of air on the surface of the large curvature of the blade in the prior art. The film cooling model is not properly corrected, the test process needs to be repeated many times and the test piece needs to be disassembled, and at the same time, it is impossible to accurately improve the efficiency of the blade cascade adiabatic film cooling
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[0025] Embodiments of the present invention are described below through specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific implementation modes, and various modifications or changes can be made to the details in this specification based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that, in the case of no conflict, the following embodiments and features in the embodiments can be combined with each other.
[0026] It should be noted that in the following description, reference is made to the accompanying drawings, which describe several embodiments of the present application. It is to be understood that other embodiments may be utilized, and mechanical, structural, electrical, and operational cha...
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The invention provides a measurement and correction method for a cascade air film cooling test, which is applied to a test piece blade, is divided into a measurement area and a measurement and correction area, and comprises the following steps: acquiring the wall surface temperature, the external fluid temperature and the cold air temperature of the test piece blade; respectively obtaining a measurement air film cooling effectiveness degree corresponding to the measurement area and a correction air film cooling effectiveness degree corresponding to the measurement correction area through calculation; and based on a measurement correction model, correcting the measured air film cooling effectiveness through the corrected air film cooling effectiveness to obtain the heat insulation air film cooling effectiveness of the test piece blade. According to the test measurement method, a measurement part and a measurement correction part are integrated on the same test piece, so that a large number of repeated tests are avoided, and the negative influence of some uncertain factors generated by disassembling and assembling the test bed in the experiment process on the experiment is avoided.
Description
technical field [0001] The present application relates to the technical field of film cooling tests, in particular to a measurement and correction method, device, equipment and medium for cascade film cooling tests. Background technique [0002] As the inlet temperature of the gas turbine continues to increase, it far exceeds the limit temperature that the blade material can withstand. Therefore, there is an urgent need for advanced cooling technology to ensure the safe and stable operation of the blades. Film cooling is an important cooling method in external cooling. How to improve the efficiency of film cooling and reduce the supply of cooling air plays a decisive role in improving the internal efficiency of gas turbines. [0003] Air film cooling technology refers to extracting cold air from the compressor to take away part of the heat inside the blade through enhanced convective heat transfer, and then flows out from the air film hole on the blade body or end wall of t...
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IPC IPC(8): F01D21/00F01D5/18G06F30/28G06F113/08G06F119/14G06F119/08
CPCF01D21/003F01D5/186G06F30/28G06F2113/08G06F2119/14G06F2119/08
Inventor 张祎李新宇谈芦益
Owner SHANGHAI ELECTRICGROUP CORP
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