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Reflux closed-circuit and open-circuit dual-purpose wind tunnel

A closed-circuit, wind tunnel technology, applied in measurement devices, instruments, aerodynamic tests, etc., can solve problems such as complex structure, inability to use wind tunnels for large-scale engineering applications, and difficult operation.

Pending Publication Date: 2019-04-16
GUODIAN ENVIRONMENTAL PROTECTION RES INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Some closed-circuit and open-circuit dual-purpose wind tunnels in foreign countries have complex structures and are very difficult to operate, so they cannot be used in wind tunnels for large-scale engineering applications.

Method used

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  • Reflux closed-circuit and open-circuit dual-purpose wind tunnel
  • Reflux closed-circuit and open-circuit dual-purpose wind tunnel
  • Reflux closed-circuit and open-circuit dual-purpose wind tunnel

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Such as figure 1 and figure 2 As shown, the dual-purpose layer wind tunnel of the present invention's backflow closed circuit and open circuit mainly includes a power and fan section 1, a first diffusion section 2, a first return section 3, a stabilization and contraction section 4, a test section 5, and a second diffusion section 6 , the second backflow section 7. An air inlet 8 and an air intake valve 11 are arranged upstream of the power and fan section 1 , and an air outlet 9 and an exhaust valve 12 are arranged downstream of the second diffuser section 6 . The power section and the fan section, the first diffusion section, the first return section, the stabilization and contraction section, the test section, the second diffusion section and the second return section can adopt all-steel structures.

[0029] Deflector units are provided at the connecting corners on both sides of the first recirculation section, and guide vane units are provided at the connecting c...

Embodiment 2

[0034] In this embodiment, it is further designed as a dual-purpose wind tunnel with open and closed circuit of return flow, and the valves at both ends of the second return section are installed on the outer wall of the second return section, and can rotate around the axis to realize inward and outward opening and closing.

Embodiment 3

[0036] In this embodiment, it is further designed that a pair of linear rolling guide rails is provided at the bottom of the deflector unit at the two corners of the second recirculation section, and the guide vane unit is translated to the inside of the second recirculation section through the pair of linear rolling guide rails.

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Abstract

The invention discloses a reflux closed-circuit and open-circuit dual-purpose wind tunnel. A power and fan section, a first diffusion section, a first reflux section, a stable and contraction section,a test section, a second diffusion section and a second reflux section are successively connected to form a closed circuit. Baffle units are arranged at joint corners on two sides of the first refluxsection. Baffle units are arranged at joint corners on two sides of the second reflux section. Valves are arranged on both ends of the second reflux section. The baffle units at two corners of the second reflux section are movable. When the valves on both ends of the second reflux section are simultaneously closed, the wind tunnel is in closed-circuit operation. When the valves on both ends of the second reflux section are simultaneously opened, the baffle units at two corners of the second reflux section move into the second reflux section, and the wind tunnel is in open-circuit operation. The drawback of constantly increasing simulation experiment error caused by constantly increasing background concentration of a tracer agent in closed-circuit operation is avoided.

Description

technical field [0001] The invention belongs to a wind tunnel experiment device, and relates to a dual-purpose closed-circuit and open-circuit simulation device for atmospheric boundary layer wind. Background technique [0002] At present, there are two types of boundary layer wind tunnels for domestic experiments, one is a closed-circuit recirculation wind tunnel, and the other is an open-circuit direct current wind tunnel. The former can generate a larger airflow velocity with lower power, and the airflow is basically not affected by the outside world, and the airflow performance is better; the latter has a simpler structure, and when simulating the diffusion of atmospheric pollutants, it will not produce a continuous increase in the local concentration of the tracer. big downside. [0003] Some closed-circuit and open-circuit dual-purpose wind tunnels in foreign countries have complex structures and are very difficult to operate, so they cannot be used in large-scale eng...

Claims

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Application Information

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IPC IPC(8): G01M9/04
CPCG01M9/04
Inventor 田文鑫姚增权郭小平沈礼敏郝天明
Owner GUODIAN ENVIRONMENTAL PROTECTION RES INST CO LTD
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