A fan-outflow type low-speed wind tunnel

By externalizing the fan and motor and eliminating the corner guide vanes, combined with a rectifier, the problems of limited testing area and uneven airflow in traditional low-speed wind tunnels are solved, enabling a wider testing area and more accurate data acquisition.

CN224499885UActive Publication Date: 2026-07-14CHINA AVIATION INT CONSTR & INVESTMENT CO LTD +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
CHINA AVIATION INT CONSTR & INVESTMENT CO LTD
Filing Date
2025-07-21
Publication Date
2026-07-14

AI Technical Summary

Technical Problem

Traditional low-speed wind tunnels have complex internal structures, which limits the test area and results in poor airflow uniformity. They cannot be used for effective testing in straight sections and corner sections, and they cannot cover the needs of multi-area collaborative testing.

Method used

Design a low-speed wind tunnel with an externally mounted fan and motor. The wind tunnel adopts an annular air guide cavity and an annular air duct structure, eliminates the guide vanes in the corner section, and sets up a rectifier device in the stable section, including a honeycomb structure and a damping net.

Benefits of technology

It expands the testing area and application scope, improves the accuracy and flexibility of test data, enables testing on straight sections and corner sections, obtains aerodynamic data that is closer to real-world scenarios, and supports multi-condition testing and data integrity.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model relates to a backflow type low speed wind tunnel of fan external, belong to aerodynamics experimental equipment technical field, solved the problem that the test area was limited, airflow homogeneity was poor caused by the internal structure complexity of traditional low speed wind tunnel in prior art. The utility model discloses the test section, collector, first diffusion section, first corner section, second diffusion section, power section, second corner section, first straight section, third corner section, second straight section, fourth corner section, stable section and contraction section are connected gradually, and the power section is equipped with annular air guide chamber, and annular air guide chamber is provided with annular air groove between power section, one side of annular air guide chamber is communicated with outside through air inlet channel, and the air inlet channel is provided with fan and motor inside. The utility model discloses the fan, motor of external equipment, annular air inlet mode, reduce the obstacle in the backflow area, expand the test area, improve airflow homogeneity.
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