Cylinder aerodynamic configuration with spiral groove for inhibiting flow-induced vibration

By designing the pneumatic shape of the cylinder with spiral grooves, the vortex vibration and vibration problems that the cylinder structure has in the flow environment are solved, the stability of the structure and wind resistance are improved, and the cost of the damper is reduced.

CN119824791APending Publication Date: 2025-04-15CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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Patent Information

Application Number
CN202311765579.6
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2023-12-21
Publication Date
2025-04-15

AI Technical Summary

Technical Problem

The cylinder structure or component is prone to vortex vibration and vibration in the flow environment, resulting in structural damage or large vibration, affecting stability and safety.

Method used

A cylinder pneumatic shape with spiral grooves is designed. By setting the grooves with spiral direction on the outer wall of the cylinder, a groove with a sine-cosine curve shape is used to adjust the number of grooves, center angle, inward height and pitch of the grooves to reduce flow separation and damage the wake rules.

Benefits of technology

It effectively suppresses the flow-induced vibration of the cylinder structure, significantly reduces vortex vibration and vibration, improves the stability and wind resistance of the structure, and reduces the cost of installing the damper.

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Abstract

The invention relates to the technical field of cylinder vibration control, and discloses a cylinder aerodynamic configuration with spiral grooves for inhibiting flow-induced vibration, which comprises a cylinder part and a plurality of spiral grooves arranged on the outer wall of the cylinder part, the cylinder part and the plurality of grooves form a cylinder structure with spiral grooves, and the cylinder structure with the spiral grooves is formed by the cylinder part and the plurality of grooves. The cross section of the cylinder structure comprises the shape of the grooves, the number of the grooves, the central angle theta of the cylinder corresponding to each groove and the concave height h of the lowest point of each groove; wherein the shape of the groove is in the form of a sine and cosine curve. The aerodynamic configuration provided by the invention is beneficial to relieving and even solving the problem of flow-induced vibration of a cylinder structure. For the stay cable, the spiral grooves can break the consistency of wake flow vortexes in the spanwise direction and weaken periodic pulsation of surface pressure of the stay cable, so that the lift coefficient and the resistance coefficient of the stay cable are reduced, and vortex-induced vibration of the stay cable is restrained; and the spiral groove can prevent the formation of a waterline, so that wind and rain induced vibration and the like of the stay cable caused by the oscillation of the waterline are avoided.
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