Test device suitable for floating fan active real-time hybrid model test

Abstract

A test device suitable for a floating fan active real-time hybrid model test comprises a floating simulation device, a fan device and a fan control module, the floating simulation device comprises a base and a simulation floating platform, and a plurality of length angle adjusting devices are connected between the base and the simulation floating platform; one end of each length angle adjusting device is hinged to the base, the other end of the length angle adjusting device is a driving end and is hinged with the simulation floating platform, and the length angle adjusting device can adjust the own length through the driving end; the fan device is arranged on the simulation floating platform, and the fan control module is electrically connected with the fan device. According to the present invention, the plurality of length angle adjusting devices are used as a degree-of-freedom adjusting structure between the base and the simulation floating platform, so that an executing mechanism for floating type foundation motion tracking is achieved; the fan control module can control the pitch angle and the rotating speed of fan blades, the pitch angle and the rotating speed of the fan model can be controlled on the premise that the cabin quality meets the requirement, so that a random wind test under a Froude number similar condition is carried out.

Description

technical field [0001] The invention belongs to the technical field of wind turbine test equipment, and in particular relates to a test equipment suitable for active real-time mixed model tests of floating wind turbines. Background technique [0002] At present, the model tests of floating wind turbines are mainly divided into two categories. One is the physical model test, that is, the wind turbine, the floating foundation and the mooring system are all reproduced in the form of a physical model, so that the test can be carried out in the pool. The test is equivalent based on the Froude similarity criterion. As for the aerodynamic load on the fan, the secondary aerodynamic load is usually ignored on the basis of satisfying the Froude similarity, and only the main aerodynamic load is simulated, such as the axial thrust of the impeller at a constant wind speed. This also inevitably brings error to the experiment. In addition, the quality of wind generation in traditional ma...

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Problems solved by technology

[0005] (2) In order to meet the real-time requirements of the test, fast and high-frequency calculations are required, so the numerical model is simplified, the blade is regarded as a rigid body and the number of blade elements is reduced as much as possible, resulting in low calculation accuracy;

[0006] (3) The generation of turbulent wind field lacks comprehensive and reliable data, and can only refer to relevant norms and experience, and there are uncertainties;

[0007] (4) The calculation method used has strict requirements on the time step, and it is difficult to match the physical model in the test

Fluid viscosity plays a major role in aerodynamic loads, which are more nonlinear than hydrodynamic loads, and the use of numerical calculations to replace aerodynamic loads in physical model tests will undoubtedly reduce the authenticity and reliability of physical model tests

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