Correction method for testing hot film on surface of rotor
A rotor surface, hot film technology, applied in the field of turbomachinery, can solve the problem of the decrease of the accuracy of the rotor surface hot film test
Active Publication Date: 2021-09-03
INST OF ENGINEERING THERMOPHYSICS - CHINESE ACAD OF SCI
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Problems solved by technology
[0003] In order to solve the problem that the test accuracy of the hot film on the rotor surface decreases, the present invention provides a test correction method for the hot film on the rotor surface
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[0024] In order to better understand the present invention, the content of the present invention is further illustrated below in conjunction with the examples, so that the advantages and features of the present invention can be more easily understood by those skilled in the art. It should be noted that the following descriptions are only preferred embodiments of the present invention, but the content of the present invention is not limited to the following embodiments. In fact, it will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the scope or spirit of the invention. For example, features illustrated or described as part of one embodiment can be used with another embodiment to yield a still further embodiment. Therefore, it is intended that the present invention cover such modifications and variations as come within the scope of the appended claims and their equivalents.
[0025] ...
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The invention discloses a correction method for testing a hot film on the surface of a rotor blade, which belongs to the technical field of impeller machinery and comprises the following steps of: comparing the change of the output value of the hot film before and after the hot film is laid on the surface of the rotor blade to obtain the change of the output value of the hot film caused by deformation of a measuring unit when the hot film is laid on the surface of the rotor; correcting a measurement error introduced in the hot film laying process; furthermore, arranging temperature and strain measuring points at the same position where a hot film is laid on a rotor blade while hot film testing is carried out on the surface of the rotor, and obtaining the change relation of an output value of a hot film measuring unit along with deformation and temperature through calibration and theoretical calculation; and correcting the output value of the hot film measurement on the surface of the rotor blade according to the measured temperature and strain, and finally improving the precision of the pneumatic parameter measurement on the hot film on the surface of the rotor blade.
Description
technical field [0001] The invention belongs to the technical field of impeller machinery, and in particular relates to a method for testing and correcting a hot film on the surface of a rotor. Background technique [0002] When measuring the parameters of the boundary layer on the surface of turbomachinery blades, affected by the adjacent blades, the passage between the blades is narrow, the probe will disturb the airflow and it is not easy to arrange, and it is difficult to accurately monitor the boundary surface by general contact measurement and non-contact measurement Therefore, it is difficult to measure the parameters of the boundary layer on the blade surface. The surface hot film has the characteristics of high frequency response, good synchronization, and minimal disturbance of the flow field, and has outstanding advantages in the measurement of the boundary layer. Therefore, the surface hot film has become the main method for measuring the dynamic characteristics ...
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IPC IPC(8): G01K19/00G01P5/10
CPCG01K19/00G01P5/10
Inventor 韩戈张燕峰阳诚武赵胜丰卢新根朱俊强
Owner INST OF ENGINEERING THERMOPHYSICS - CHINESE ACAD OF SCI