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Airflow parameter adjustment method and device based on wind tunnel

A technology of airflow parameters and adjustment methods, which is applied in the direction of measuring devices, control/regulation systems, aerodynamic tests, etc., and can solve problems such as wind tunnels without airflow temperature and airflow

Active Publication Date: 2019-02-05
朱兰英
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Problems solved by technology

The current wind tunnels are all wind tunnels where the gas temperature is at room temperature, and there is no wind tunnel that can adjust the airflow temperature and airflow volume

Method used

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  • Airflow parameter adjustment method and device based on wind tunnel
  • Airflow parameter adjustment method and device based on wind tunnel

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Embodiment Construction

[0017] In order to make the object, technical solution and advantages of the present invention clearer, the airflow parameter adjustment method and device based on the wind tunnel of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0018] like figure 1 As shown, it is a flowchart of the steps of a method for adjusting airflow parameters based on a wind tunnel in an embodiment. Specifically include the following steps:

[0019] Step 101, setting parameters to adjust the given value of the input airflow parameter and the given value of the output airflow parameter in the combination unit.

[0020] Step 102, the first PLC controller receives the actual input airflow temperature value collected by the first temperature sensor in real time, and compar...

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Abstract

The invention relates to an airflow parameter adjusting method and device based on a wind tunnel; the method comprises the following steps: setting input airflow parameter given values and output airflow parameter given values of a parameter adjusting combined unit; using a first PLC controller to receive a real input airflow temperature value, comparing the real input airflow temperature value with the airflow temperature value in the input airflow parameter given values, and adjusting according to the first deviation value; using a second PLC controller to receive a real output airflow temperature value, comparing the real output airflow temperature value with the airflow temperature value in the output airflow parameter given values, and adjusting according to the second deviation value; using a third PLC controller to receive a real input airflow pressure value, comparing the real input airflow pressure value with the airflow pressure value in the input airflow parameter given values, and adjusting according to the third deviation value; using a fourth PLC controller to receive a real output airflow flow value, comparing the real output airflow flow value with the airflow flow value in the output airflow parameter given values, and adjusting according to the fourth deviation value. The method can accurately adjust the airflow temperature and flow value in the wind tunnel, thus providing high flexibility and usability.

Description

technical field [0001] The invention relates to the technical field of aerodynamic wind tunnels, in particular to a wind tunnel-based airflow parameter adjustment method and device. Background technique [0002] As we all know, in the field of flow field velocity measurement, hot wire anemometer velocity measurement is a widely used velocity measurement method. The principle of the hot wire method is to place a energized electric heating wire, that is, the hot wire, in the airflow. The change in resistance of the hot wire in the airflow due to the change in heat dissipation is related to the flow rate. The change in resistance can be reflected in the change in the electrical signal, and finally get Correspondence between flow velocity and electrical signal. The hot wire needs to be calibrated with a wind tunnel before use. At the same time, it is necessary to ensure that the airflow temperature in the wind tunnel is the same as the actual measured airflow temperature. If th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01M9/06G05D27/02
CPCG01M9/06G05D27/02
Inventor 朱兰英
Owner 朱兰英
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