An evaluation method for the application effect of thermal barrier coatings on turbine blades
A thermal barrier coating, turbine blade technology, applied in special data processing applications, instruments, electrical digital data processing, etc., can solve problems such as poor thermal insulation performance, disasters, difficulties, etc. Benefit, reduce the effect of application
Active Publication Date: 2020-02-07
XIANGTAN UNIV
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In addition, due to the harsh service environment, the thermal barrier coating may peel off and fail during the application process, resulting in the blade base being exposed to high-temperature gas, resulting in huge losses and disasters. Therefore, the service life restricts the application and development of thermal barrier coatings another key question
[0004] The thermal insulation performance and service life of thermal barrier coatings are two very important parameters, which have been studied and predicted in large quantities, and stress is the most important factor affecting service life. However, due to the complexity of the blade structure, thermal barrier coatings in Under different working conditions, the thermal insulation performance may be good but the stress is too high, resulting in a low service life, and the stress may be low but the thermal insulation performance is not good, leading to early failure of the base blade, which makes the design and application of thermal barrier coatings at the expense of the other, causing huge difficulties
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[0036] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in combination with specific embodiments and with reference to the accompanying drawings. It should be understood that these descriptions are exemplary only, and are not intended to limit the scope of the present invention. Also, in the following description, descriptions of well-known structures and techniques are omitted to avoid unnecessarily obscuring the concept of the present invention.
[0037] Such as figure 1 As shown, the evaluation method of the application effect of the turbine blade thermal barrier coating of the present invention comprises the following steps:
[0038] (1) In the geometric modeling software, the geometric model of the thermal barrier coating, the geometric model of the turbine blade without thermal barrier coating and the geometric model of the external flow field are established....
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An evaluation method for the application effect of a thermal barrier coating on a turbine blade, comprising: the distribution of the temperature field according to the two calculation domains of the thermal barrier coating and the turbine blade without the thermal barrier coating, and the stress field of the thermal barrier coating The maximum principal stress and maximum shear stress data are calculated by a preset program to obtain the thermal insulation efficiency of the thermal barrier coating and obtain the local comprehensive and global comprehensive evaluation factors of the thermal barrier coating. The present invention realizes a three-dimensional turbine blade with air film holes The simulation method of thermal barrier coatings; establish a thermal barrier coating application effect evaluation parameter, and evaluate thermal barrier coatings from the two aspects of heat insulation efficiency and stress level, which can more comprehensively reflect the comprehensive application of thermal barrier coatings performance, more conducive to the design and analysis of thermal barrier coatings.
Description
technical field [0001] The invention relates to the technical field of a heat-insulating protective coating system in a high-performance aero-engine, in particular to an evaluation method for the application effect of a turbine blade thermal barrier coating. Background technique [0002] Thermal barrier coatings (TBCs) are ceramic coatings that are deposited on the surface of high temperature resistant metals or superalloys. The thermal barrier coating plays a role of heat insulation for the base material, which can reduce the base temperature, so that the engine turbine blade can operate at high temperature, and has the characteristics of high melting point, low thermal conductivity, corrosion resistance, and thermal shock resistance. During high-temperature service, thermal barrier coatings can protect high-temperature substrates, increase the temperature and thermal efficiency of heat engines, and thus are widely used in the fields of aviation, chemical industry, metallur...
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IPC IPC(8): G06F30/23G06F111/10G06F119/08G06F113/06
CPCG06F30/23G06F30/17G06F2111/10
Inventor 杨丽刘志远周益春朱旺
Owner XIANGTAN UNIV