Data processing method for five-hole probe

A data processing, five-hole probe technology, applied in electrical digital data processing, special data processing applications, instruments, etc., can solve the problems of not considering the change of different Mach numbers of calibration data, cumbersome data processing process, etc., to achieve easy understanding , the effect of improving convenience and accuracy

Active Publication Date: 2016-11-09
INST OF ENGINEERING THERMOPHYSICS - CHINESE ACAD OF SCI
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Problems solved by technology

In the former method, the method of successive dimensionality reduction is adopted, and the data processing process is cumbersome; in the second method, only the direction characteristic network under a single Mach number is c

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  • Data processing method for five-hole probe
  • Data processing method for five-hole probe

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Embodiment Construction

[0026] In order to make the object, technical solution and advantages of the present invention clearer, the following examples are given to further describe the present invention in detail.

[0027] Taking the data processing of the five-hole probe as an example, the use process of the data processing is described in detail. The specific implementation method of the five-hole probe data processing method involved in the present invention includes four steps in use:

[0028] (1) For the experimental data at a certain measurement point, record the five-hole pressure values ​​of the five-hole probes, and record the total pressure and static pressure values ​​of the flow field parameters at the same time. The total pressure characteristic coefficient, the static pressure characteristic coefficient, the deflection angle characteristic coefficient and the pitch angle characteristic coefficient are respectively calculated by using the formulas described in the background art above.

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Abstract

The invention discloses a data processing method used for improving the application efficiency of a five-hole probe, and the method is a triple interpolation-based data processing method for the five-hole probe. The method comprises the steps of firstly, assuming a Mach number, taking Mach number, deflection angle and pitch angle calibration pressure coefficients as known variables, substituting probe calibration data, and obtaining a deflection angle and a pitch angle by adopting triple interpolation; secondly, taking the Mach number, the deflection angle and the pitch angle as known variables, and obtaining total pressure and static pressure characteristic coefficients separately by adopting the triple interpolation; thirdly, substituting an experimental measurement value and the total pressure and static pressure characteristic coefficients into total pressure and static pressure characteristic coefficient formulae, and performing calculation to obtain a total pressure, a static pressure and a Mach number; and finally, performing difference operation on the obtained Mach number and the assumed Mach number, and performing iterative computing until a difference value is smaller than a set precision value. According to the novel data processing method, the pressure data measured by a five-hole probe experiment can be quickly and conveniently converted into flow field velocity magnitude and direction, and the data interpolation precision can be improved.

Description

technical field [0001] The invention relates to the technical field of engineering measurement, and relates to a data processing method for improving the application efficiency of a calibrated five-hole probe. Background technique [0002] The five-hole probe measures the flow field, and can obtain the velocity, direction, total pressure, and static pressure of the measurement point in the flow field at the same time, and has the advantages of convenient operation and easy repeated measurement. [0003] There are three measurement methods for five-hole probes: opposite measurement method, semi-direct measurement method and non-direct measurement method. The opposite measurement method and the semi-antimetric measurement method have the characteristics of intuitive operation and less data processing, but it takes time to find the pressure balance between each pressure measuring hole. The non-contrasting measurement method is easy to operate, and the data can be collected dir...

Claims

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Application Information

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IPC IPC(8): G06F19/00
CPCG16Z99/00
Inventor 张彬彬赵庆军崔伟伟项效镕
Owner INST OF ENGINEERING THERMOPHYSICS - CHINESE ACAD OF SCI
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