Active rotary airflow field test system

Abstract

The invention relates to the technical field of experimental fluid mechanics and aerodynamics and discloses an active rotation type airflow field test system. The system comprises a flow equalizing acceleration duct and a rotation mechanism, in the flow equalizing acceleration duct, the cross section area of a contraction section is gradually reduced along the air inlet direction; the test section is of a cylindrical ventilation structure and is used for placing a test object; the sectional area of the diffusion section is gradually increased in the air inlet direction; the contraction section, the test section and the diffusion section are symmetrical structures taking the first reference surface as a symmetrical central surface; in the contraction section, a distance from the midpoint of the air inlet inner side edge to the second reference surface is the maximum value a of the distance from any point in the air inlet inner side edge to the second reference surface, a distance from the midpoint of the air inlet outer side edge to the second reference surface is the maximum value b of the distance from any point in the air inlet outer side edge to the second reference surface, and b is smaller than a. In the active rotary airflow field test system, the flow field homogeneity in the test section is ensured through the flow-equalizing acceleration duct (and the asymmetric honeycomb device) with a specific structure.

Description

technical field [0001] The invention relates to the technical field of experimental fluid mechanics and aerodynamics, in particular to an active rotating airflow field test system. Background technique [0002] The high-speed movement of various devices in complex environments such as low temperature, low pressure, ice, heavy fog, and dust is a very common working condition, such as various high-pressure equipment on the roof of high-speed rail, aircraft wings and air inlet components, wind power Generator blades and more. At the same time, the aerodynamic performance and environmental adaptability testing of high-speed motion devices are directly related to the finalized design of related devices and equipment and the safe and stable operation status after they are put into production. [0003] In the current design, operation and maintenance, the only way to test the performance of the device in high-speed airflow is the wind tunnel test. However, traditional wind tunnel...

AI Technical Summary

Problems solved by technology

However, traditional wind tunnels are expensive to build, occupy a large area, and consume power in megawatts. Operation and maintenance are difficult and consume a lot of material, financial and manpower

At the same time, for the complex environmental conditions of equipment in actual operation, such as the high-speed operation of high-voltage equipment pillar insulators on the roof of high-speed rail traction locomotives in heavy fog and sandy environments, and the high-speed operation of aircraft in high-altitude, low-temperature, and low-pressure environments, wind tunnel tests are powerless.

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