Device and method for testing fluid-structure interaction effect of flexible riser under internal and external flow clamping

Abstract

The invention relates to a device and method for testing the fluid-solid coupling effect of a flexible riser under internal and external flow clamping. The device is composed of a riser model, an upstream pipe section dip angle adjusting system, a tension testing module, an internal flow circulating system, a flow field monitoring system, a vibration monitoring system and a data acquisition terminal. The downward inclination angle of the upstream pipe section of the stand pipe model is changed by adjusting the spherical joint lifting rod, the water level height in the circulating water tank and the outflow flow speed are changed by adjusting the water pump frequency of the circulating water tank and the opening degree of a water outlet gate, and the gas-liquid flow speed and the gas-liquid ratio are changed by adjusting the opening degrees of a liquid path valve and a gas path valve. The flow velocity, the pressure, the gas-liquid two-phase flow pattern, the displacement and the wake flow field information are comprehensively obtained through the acoustic Doppler velocimeter, the pressure sensor, the high-speed camera and the particle imaging velocity measurement camera, and the fluid-solid coupling effect mechanism of the flexible riser under the clamping action of the internal flow and the external flow is revealed.

Description

technical field [0001] The invention belongs to the technical field of experimental testing of fluid-solid coupling vibration response of marine flexible risers, and in particular relates to a testing device and method for fluid-solid coupling effects of flexible risers pinched by internal and external flows. Background technique [0002] my country's offshore oil and gas resources account for about 25% to 30% of the world's total marine oil and gas resources. Vigorously developing the offshore oil and gas industry and increasing the intensity of offshore oil and gas exploration and development are not only to implement the central government's policy of increasing domestic oil and gas exploration and development, but also to protect national energy resources. Specific measures and inevitable requirements for safety. With the development of deep-water oil and gas fields and the increase of production water depth, flexible risers are widely used in offshore oil and gas product...

AI Technical Summary

Problems solved by technology

At present, there are few related studies on the fluid-solid coupling vibration of flexible risers, and there are even fewer experimental tests involving the variable inclination angle of the upstream pipe section of the riser.

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