Reduction method for vortex-induced vibration of two cylinders with tandem arrangement

• Main Authors: TU CHENGXU, DENG XIANGLONG, YIN ZHAOQIN, ZHANG ZHENGANG, WU YIYANG, BAO FUBING
• Format: Patent
• Language: Chinese; English
• Published: 10.10.2017
• Subjects: BLASTING; FLUID DYNAMICS, i.e. METHODS OR MEANS FOR INFLUENCING THE FLOWOF GASES OR LIQUIDS; FLUID-PRESSURE ACTUATORS; HEATING; HYDRAULICS OR PNEUMATICS IN GENERAL; LIGHTING; MECHANICAL ENGINEERING; WEAPONS

The invention discloses a reduction method for vortex-induced vibration of two cylinders with tandem arrangement. The flow of an injected fluid is utilized for modulating to control the separation and the development of a boundary layer to be within a very small range of a near wake stream, so that the adverse pressure gradient produced by the two cylinders with tandem arrangement in a detour flow is reduced, the separation of the boundary layer is avoided or limited, originally periodical shedding vortex and a wake stream large-vortex structure formed by enhancement and evolution of the vortex are reduced or disappeared and lose periodicity under the action of the injected fluid, and the aim of reducing or suppressing the vortex-induced vibration of the two cylinders with tandem arrangement is achieved. 本发明公开了种串列双圆柱体涡激振动的消减方法。本发明利用喷射流体的流动调制将边界层的分离及发展控制在近尾流个很小的范围内，以减小串列双圆柱在绕流中产生的逆压梯度，避免或限制边界层的分离，进而使原本周期性脱落的旋涡及其增强、演化构成的尾流大涡结构在喷射流体的作用下消减或消失、失去周期性，达到消减或抑制串列双圆柱涡激振动的目的。