Numerical Analysis of Influence of Blade Icing on Dynamic Response of Integrated Wind Turbine Structure

doi:10.16183/j.cnki.jsjtu.2021.258

Abstract

Abstract:

Based on the integrated jacket-support offshore wind turbine model of the National Renewable Energy Laboratory (NREL), the computational fluid dynamics (CFD) method is coupled with the wind turbine integrated analysis method to study the blade icing process and its influence on the overall dynamic performance of the wind turbine. First, the blade motion attitude calculated by the integrated analysis method is input into CFD. The discrete multiphase model and melting solidification model are used to simulate the icing growth of three-dimensional wind turbine blades. The k-ε turbulence model is used to calculate the aerodynamic performance before and after icing. Finally, the aerodynamic results after blade icing are returned to the integrated analysis method to analyze the influence of blade icing on the overall response of the wind turbine. The results show that the blade icing increases linearly along the blade span. The icing is mainly concentrated on the leading edge of the blade with the thickest ice accumulation at the tip. The lift coefficient decreases and the drag coefficient increases after icing. Blade icing will reduce the power of the whole machine, the torque, and the rotor speed. At the same time, it will lead to additional vibration response at the blade tip and tower top, and increase the wind speed required by the wind turbine to reach the rated power.

Key words: wind power in ice area, blade icing, analysis of wind turbine integration, power loss, coupling analysis

CLC Number:

P751
TM 315

CHUANG Zhenju, LI Chunzheng, LIU Shewen. Numerical Analysis of Influence of Blade Icing on Dynamic Response of Integrated Wind Turbine Structure[J]. Journal of Shanghai Jiao Tong University, 2022, 56(9): 1176-1187.

Figures/Tables 19

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名称	取值
水深	50
导管架基础高度	70
叶轮直径	126
塔高	68
轮毂直径	3

叶展位置/m	弦长/m	扭转角/(°)	翼型类型
0	3.542	13.308	Cylinder1
1.3667	3.542	13.308	Cylinder1
4.1	3.854	13.308	Cylinder1
6.8333	4.167	13.308	Cylinder2
10.25	4.557	13.308	DU40_A17
14.35	4.652	11.48	DU35_A17
18.45	4.458	10.162	DU35_A17
22.55	4.249	9.011	DU30_A17
26.65	4.007	7.795	DU25_A17
30.75	3.748	6.544	DU25_A17
34.85	3.502	5.361	DU21_A17
38.95	3.256	4.188	DU21_A17
43.05	3.01	3.125	NACA64_A17
47.15	2.764	2.319	NACA64_A17
51.25	2.518	1.526	NACA64_A17
54.6667	2.313	0.863	NACA64_A17
57.4	2.086	0.37	NACA64_A17
60.1333	1.419	0.106	NACA64_A17
61.5	1.419	0.106	NACA64_A17

网格类型	网格数量	攻角 α'/(°)	来流速度/ (m·s^-1)	温度/ ℃	水滴含量/ (g·m^-3)	水滴直径/ μm	时间/s
1	58643	3.5	67.1	-6.42	1.0	20	360
2	174993	3.5	67.1	-6.42	1.0	20	360
3	493778	3.5	67.1	-6.42	1.0	20	360

计算参数	数值
环境温度/K	258
风速/(m·s^-1)	11.4
水滴平均直径/μm	30
空气中水滴含量/(g·m^-3)	8
叶片转速/(r·min^-1)	12.1
结冰时间/min	300