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Airflow velocity calculation method, system, device and storage medium

A technology of air velocity and calculation method, which is applied in the direction of measuring fluid velocity by pressure difference, velocity/acceleration/impact measurement, instruments, etc., and can solve problems such as total pressure deviation

Active Publication Date: 2021-10-15
CHINA AUTOMOTIVE ENG RES INST +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, when the airflow direction has a deflection angle and is no longer facing the total pressure hole of the measuring device, the measured value of the total pressure hole will deviate from the total pressure value of the measured flow field
Therefore, there is a certain error in the calibration and calculation method in practical application. When the airflow deflection angle (yaw, pitch) is larger, the error will be larger

Method used

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  • Airflow velocity calculation method, system, device and storage medium
  • Airflow velocity calculation method, system, device and storage medium
  • Airflow velocity calculation method, system, device and storage medium

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Embodiment 1

[0089] In order to measure the air velocity (including size and direction) of a certain place more accurately, this embodiment provides an air velocity calculation method, such as Figure 5 As shown, steps S1-S3 are included.

[0090] S1. Introduce the total pressure value and static pressure value of the flow field, respectively establish the yaw angle coefficient, total pressure coefficient, static pressure coefficient and the measured value of the pressure measuring hole of the first pressure measuring device, the total pressure value and static pressure of the flow field The first-third relationship between values.

[0091] In this step S1, the first pressure measuring device adopts an airfoil structure, such as Figure 6As shown, there are three pressure measuring holes, including the total pressure hole P2, the first static pressure hole P1 and the second static pressure hole P3; The pressure hole P2 is set at the top of the arc on the side of the arc, and the first st...

Embodiment 2

[0138] Instructions attached Figure 11 The reference numerals in include: the first pressure measuring device 10 , the second pressure measuring device 20 , the air flow control device 30 , and the computing module 40 .

[0139] Corresponding to the airflow velocity calculation method in Embodiment 1, this embodiment provides an airflow velocity calculation system, such as Figure 11 As shown, it includes a first pressure measuring device 10, a second pressure measuring device 20, an airflow control device 30, and a computing module 40;

[0140] The calculation module 40 is used to introduce the total pressure value and the static pressure value of the flow field, respectively establish the yaw angle coefficient, the total pressure coefficient, the static pressure coefficient and the measured value of the pressure measuring hole of the first pressure measuring device 10, and the flow field. The first-third relationship between the total pressure value and the static pressure...

Embodiment 3

[0155] Corresponding to the airflow velocity calculation method in Embodiment 1 and the airflow velocity calculation system in Embodiment 2, this embodiment provides an airflow velocity calculation device, including a first pressure measuring device 10, a second pressure measuring device 20, For any device or module in the computing module 40 and the airflow control device 30 , the difference between this embodiment and Embodiment 2 is that this embodiment focuses on the protection of one type of equipment, and focuses on the integrity of the structure. That is to say, this embodiment protects the device made of any one of the modules in Embodiment 2 alone, and also protects the device in which any two, three, four or all five types are integrated together.

[0156] However, in this embodiment, the airflow velocity calculation device includes a calibration device and a calculation device.

[0157] Among them, the calibration equipment includes:

[0158] Airflow control device...

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Abstract

The invention relates to the field of meteorological measurement, in particular to an airflow velocity calculation method, system, equipment and a storage medium. The method first establishes the first-third relationship between the yaw angle coefficient, the total pressure coefficient, the static pressure coefficient, the measured value of the pressure measuring hole of the first pressure measuring device, the total pressure value of the flow field, and the static pressure value , when the first pressure measuring device is calibrated in the early stage, the total pressure value and the static pressure value of the current airflow are measured at the same time, and the measured values ​​are introduced into the calibration calculation of the first pressure measuring device to establish the yaw angle coefficient, The functional relationship between the total pressure coefficient, the static pressure coefficient and each pressure measurement value is more realistic; in actual measurement applications, according to the first-third relational formula and each three-dimensional relationship surface diagram obtained through calibration, the first pressure measurement device The measured value can calculate the air velocity and direction of the measured flow field. In the calculation process, a speed verification and iterative method is introduced to ensure that the measurement error is within a small range through iterative calculation.

Description

technical field [0001] The invention relates to the field of meteorological measurement, in particular to an airflow velocity calculation method, system, equipment and a storage medium. Background technique [0002] Porous pressure measuring devices, such as three-hole probes, five-hole probes and other heterogeneous porous pressure measuring devices, have pressure measuring holes at different positions of the device. During the measurement, the pressure measured by each pressure measuring hole is different. By analyzing and processing the measured pressure value, the air velocity and direction of the measured flow field can be calculated. [0003] by figure 1 and figure 2 The five-hole pressure measuring device shown (also called five-hole probe, whose pressure measuring holes include Q1 in the center and Q2-Q5 around it) as an example, the existing calibration and calculation methods are mostly calibrated in the wind tunnel, Establish the relational expressions (5), (6...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01P5/16G01P13/02
CPCG01P5/16G01P13/025
Inventor 黄滔肖凌何显中王勇周舟朱习加王庆洋
Owner CHINA AUTOMOTIVE ENG RES INST
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