Numerical simulation method for icing of wind turbine

A numerical simulation and wind turbine technology, applied in wind turbines, monitoring of wind turbines, engines, etc., can solve problems such as long calculation time and difficulty in grid reconstruction, and achieve efficient simulation effects

Inactive Publication Date: 2019-05-14
LOW SPEED AERODYNAMIC INST OF CHINESE AERODYNAMIC RES & DEV CENT
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Problems solved by technology

However, it is difficult to reconstruct the grid under the condition of complex solid wall shape, and the long calculatio

Method used

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  • Numerical simulation method for icing of wind turbine
  • Numerical simulation method for icing of wind turbine
  • Numerical simulation method for icing of wind turbine

Examples

Experimental program
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Embodiment

[0042] S1: Obtain the shape parameters of the wind turbine, and the flow field conditions (inflow wind speed, wind direction, wind shear profile, turbulence, etc.), and calculate the position of the smooth blade along the span direction of different two-dimensional airfoil sections through the calculation of the theoretical model of the momentum blade element Angle of attack α and relative inflow velocity V at rel distributed;

[0043]

[0044]

[0045] Among them, V is the horizontal free flow velocity, Ω is the rotation speed of the wind turbine, r is the spanwise position of the current airfoil section, is the twist angle of the current airfoil section. a and b are the axial and circumferential induction factors respectively, which can be calculated by the classical momentum-blade element theory model;

[0046] S2: According to the inflow wind speed and angle of attack of the local two-dimensional airfoil section calculated in S1, use the viscous inviscid coupling ...

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Abstract

The invention relates to the technical field of testing of wind turbines, and discloses a numerical simulation method for icing of a wind turbine. According to the numerical simulation method for icing of the wind turbine, an ice-coated wind turbine quasi-three-dimensional calculation model is put forward based on a momentum-blade element theory model through a viscous non-sticky coupling method and an immersion boundary method; the viscous non-sticky coupling method has the characteristics of high calculation efficiency and accurate calculation results for wing-type turbulent flow under the attachment flow condition; and through the orthogonal Cartesian grid-based immersion boundary method, the accuracy of flow separation calculation can be ensured while grid reconstruction is avoided. The ice-coated wind turbine quasi-three-dimensional calculation model is based on the analysis of the momentum-blade element theory model, the problem of icing of the three-dimensional wind turbine is converted into a problem of two-dimensional wing-type icing extending towards different positions, and on this basis, the advantages of the viscous non-sticky coupling method and the advantages of theimmersion boundary method are sufficiently combined to achieve accurate and efficient simulation of icing of the wind turbine, and an important foundation is laid for engineering analysis of the ice-coated wind turbine.

Description

technical field [0001] The invention relates to the technical field of wind turbine testing, in particular to a numerical simulation method for wind turbine icing. Background technique [0002] Wind energy resources in cold climates have the advantages of high wind energy density and wide distribution areas. As of 2011, the proven reserves of wind energy resources in cold climates around the world have reached 60GW. In my country, with the successive development of the "Three North Regions" and the seven major wind power bases, the wind power market has gradually expanded to areas with severe cold climate characteristics. However, under cold weather conditions, the icing problem of wind turbines has become an important reason affecting the power generation and the safety of the wind turbines. [0003] Icing calculation usually includes four modules, namely flow field calculation, droplet trajectory and collection rate calculation, icing model calculation and solid wall bou...

Claims

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Application Information

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IPC IPC(8): F03D80/40F03D17/00
CPCY02E10/72
Inventor 王强肖京平史雨陈立金华
Owner LOW SPEED AERODYNAMIC INST OF CHINESE AERODYNAMIC RES & DEV CENT
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