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Calibration method of five-hole probe

A five-hole probe and calibration method technology, applied in the testing/calibration of velocity/acceleration/shock measuring equipment, complex mathematical operations, measuring devices, etc., can solve the problem of poor adaptability to changing flow fields and labor time costs Advanced problems, to achieve the effect of reducing the calibration workload, ensuring accuracy, and expanding the scope of use

Inactive Publication Date: 2020-08-04
大连凌海华威科技服务有限责任公司
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Problems solved by technology

The existing flow field measurement technology based on the five-hole probe adopts the linear interpolation method, but in the actual flow field measurement, the linear interpolation method does not have a good adaptability to the changing flow field, and Ma exceeds a certain range of the calibration Ma. Large error, a large number of calibration experiments are often required in actual measurement, and the cost of manpower and time is high

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Embodiment Construction

[0037] The present invention provides a five-hole probe calibration method. In order to make the purpose, technical solution and effect of the present invention more clear and definite, the present invention will be further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0038] Those skilled in the art will understand that unless otherwise stated, the singular forms "a", "an", "said" and "the" used herein may also include plural forms. It should be further understood that the word "comprising" used in the description of the present invention refers to the presence of said features, integers, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, Integers, steps, operations, elements, components, and / or groups thereof. It...

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Abstract

The invention discloses a calibration method of a five-hole probe. The method comprises the steps: determining a function relation between Mach numbers and all characteristic parameters based on a plurality of characteristic curves for calibrating the Mach numbers; and based on the function relation between the Mach number and each characteristic parameter, determining a characteristic curve of each Mach number in a to-be-calibrated range. In the invention, calibration is carried out under a plurality of pieces of angle position information of each mach number; for each angular position information, based on the characteristic parameters of each Mach number under the angle position information, the function relation between the Mach number under the angle information and the characteristicparameters is determined, and based on the function relation, the characteristic parameters of the Mach number to be calibrated under the angle position information are determined, and during measurement, the Mach number is close to a real value from an initial value through oscillation till that a precision requirement is met. Therefore, on the premise of ensuring the precision, the calibrationof one Mach interval is realized, a calibration workload of the five-hole probe before use is reduced, and an application range of the five-hole probe is expanded.

Description

technical field [0001] The invention relates to the technical field of engineering measurement, in particular to a calibration method for a five-hole probe. Background technique [0002] The five-hole probe is a common method for measuring the scalar and vector characteristics of complex three-dimensional flow fields. It is widely used because of its high precision, simple equipment, and low cost. The existing flow field measurement technology based on the five-hole probe adopts the linear interpolation method, but in the actual flow field measurement, the linear interpolation method does not have a good adaptability to the changing flow field, and Ma exceeds a certain range of the calibration Ma. If the error is relatively large, a large number of calibration experiments are often required in the actual measurement, and the cost of manpower and time is high. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a fiv...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01P21/02G06F17/15
CPCG01P21/025G06F17/15
Inventor 王佳璐史远鹏王宇
Owner 大连凌海华威科技服务有限责任公司
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