以IEA 15 MW风力机叶片为研究对象,建立叶片气弹系统动力学模型,对高尖速比下发生颤振时的气弹响应进行分析,并对其中的多自由度耦合特性开展深入研究。结果显示,在高尖速比下,该风力机长柔叶片发生挥舞-扭转耦合的弯扭耦合颤振,在三自由度上的振动均包含挥舞和扭转固有频率,但颤振的维持由挥舞和扭转自由度上气动力做功维持,挥舞、扭转的瞬时气动功率发展存在明显的耦合现象。摆振方向则基本无能量贡献,在全过程中仅有微弱气动功率,仅由于叶片结构耦合特性,受挥舞和扭转激励发生受迫振动。
Abstract
This paper takes the IEA 15 MW wind turbine blade as the research object, establishes the dynamic model of the aeroelastic system for the blades, analyzes the aeroelastic response during flutter at high tip speed ratio, and conducts in-depth research on the multi-degree-of-freedom coupling characteristics therein. The results show that at high tip speed ratio, the long and flexible blade of this wind turbine undergoes a coupled bending-torsion flutter of pitch-torsion. The vibrations in the three degrees of freedom all contain the natural frequencies of pitch and torsion. However, the maintenance of flutter is sustained by the aerodynamic power work in the pitch and torsion degrees of freedom. There is an obvious coupling phenomenon in the development of the instantaneous aerodynamic power of pitch and torsion. In the direction of yaw, there is basically no energy contribution. There is only weak aerodynamic power throughout the process, and it only undergoes forced vibrations due to the excitation of pitch and torsion because of the coupling characteristics of the blade structure.
关键词
风力机 /
气动弹性 /
弯扭耦合 /
颤振 /
叶素动量理论
Key words
wind turbines /
aeroelasticity /
bend-twist coupling /
flutter /
blade element momentum theory
{{custom_sec.title}}
{{custom_sec.title}}
{{custom_sec.content}}
参考文献
[1] HANSEN M H.Aeroelastic instability problems for wind turbines[J]. Wind energy, 2007, 10(6): 551-577.
[2] POURAZARM P, MODARRES-SADEGHI Y, LACKNER M.A parametric study of coupled-mode flutter for MW-size wind turbine blades[J]. Wind energy, 2016, 19(3): 497-514.
[3] REPORT S, GRIFFITH D T, ASHWILL T D.The Sandia 100-meter all-glass baseline wind turbine blade: SNL100-00[R]. Springfield, VA: Sandia National Laboratories, 2011: 1-62.
[4] WANG L, LIU X W, KOLIOS A.State of the art in the aeroelasticity of wind turbine blades: aeroelastic modelling[J]. Renewable and sustainable energy reviews, 2016, 64: 195-210.
[5] LI S, CARACOGLIA L.Stochastic Flutter Analysis of Wind Turbine Blades via Surrogate Models: Artificial Neural Networks vs. Stochastic Collocation[C]//6th American Association for Wind Engineering Workshop. Clemson University, 2021.
[6] CARACOGLIA L.Higher-order moment stability of large wind turbine blades under stochastic perturbations[C]// Journal of Physics: Conference Series. IOP Publishing, 2024, 2647(11): 112001.
[7] GRIFFITH D T, CHETAN M.Assessment of flutter prediction and trends in the design of large-scale wind turbine rotor blades[J]. Journal of physics: conference series, 2018, 1037(4): 042008.
[8] PIRRUNG G R, MADSEN H A, KIM T.The influence of trailed vorticity on flutter speed estimations[J]. Journal of physics: conference series. 2014, 524(1): 012048.
[9] 高龙, 林立辉, 杨宛生, 等. 大型柔性风电叶片气弹响应分析[J]. 太阳能学报, 2024, 45(8): 572-580.
GAO L, LIN L H, YANG W S, et al.Aeroelastic response analysis of large flexible wind turbine blades[J]. Acta energiae solaris sinica, 2024, 45(8): 572-580.
[10] 夏煜盛. 大型背风式风力机叶片预弯型线与降载优化研究[D]. 扬州: 扬州大学, 2024.
XIA Y S.Load reduction and blade pre-bend optimization research of large downwind turbine[D]. Yangzhou: Yangzhou University, 2024.
[11] ZHOU X D, HUANG K F, LI Z.Effects of bend-twist coupling on flutter limits of composite wind turbine blades[J]. Composite structures, 2018, 192: 317-326.
[12] 戴丽萍, 白雪峰, 王晓东, 等. 大型风力机叶片颤振边界的预测分析[J]. 工程热物理学报, 2022, 43(9): 2357-2362.
DAI L P, BAI X F, WANG X D, et al.Prediction and analysis of blade flutter boundary of large wind turbine[J]. Journal of engineering thermophysics, 2022, 43(9): 2357-2362.
[13] SESSAREGO M, RAMOS-GARCÍA N, SHEN W Z. Analysis of winglets and sweep on wind turbine blades using a lifting line vortex particle method in complex inflow conditions[J]. Journal of physics: conference series, 2018, 1037(2): 022021.
[14] TRAN T T, KIM D H.The platform pitching motion of floating offshore wind turbine: a preliminary unsteady aerodynamic analysis[J]. Journal of wind engineering and industrial aerodynamics, 2015, 142: 65-81.
[15] SNEL H, SCHEPERS J.Joint investigation of dynamic inflow effects and implementation of an engineering method[R]. ECN-C-94-107, 1995.
[16] BORTOLOTTI P, CHETAN M, BRANLARD E, et al.Wind turbine aeroelastic stability in OpenFAST[J]. Journal of physics: conference series, 2024, 2767(2): 022018.
[17] 李义金, 王同光. 截面参考系对采用梁模型风力机叶片的动态性能影响分析[J]. 太阳能学报, 2017, 38(1): 16-22.
LI Y J, WANG T G.Dynamic analysis of wind turbine blade based on different references[J]. Acta energiae solaris sinica, 2017, 38(1): 16-22.
[18] WANG Q, SPRAGUE M A, JONKMAN J, et al.BeamDyn: a high-fidelity wind turbine blade solver in the FAST modular framework[J]. Wind energy, 2017, 20(8): 1439-1462.
[19] GAERTNER E, RINKER J M, SETHURAMAN L, et al.IEA wind TCP task 37: definition of the IEA 15-megawatt offshore reference wind turbine[R]. National Renewable Energy Lab.(NREL), Golden, CO(United States), 2020.
[20] LOUBEYRES J, PFISTER J L, BLONDEL F, et al.Stall flutter instabilities on the IEA-15 reference wind turbine in idling conditions: code-to-code comparisons and physical analyses[J]. Journal of physics: conference series, 2022, 2265(3): 032019.
[21] QIAN X H, ZHANG B X, GAO Z T, et al.Flutter limit optimization of offshore wind turbine blades considering different control and structural parameters[J]. Ocean engineering, 2024, 310: 118558.
[22] LI B, TIAN D, WU X X, et al.The impact of bend-twist coupling on structural characteristics and flutter limit of ultra-long flexible wind turbine composite blades[J]. Energies, 2023, 16(15): 5829.
[23] RINKER J, GAERTNER E, ZAHLE F, et al.Comparison of loads from HAWC2 and OpenFAST for the IEA wind 15 MW reference wind turbine[J]. Journal of physics: conference series, 2020, 1618(5): 052052.
[24] 李贝, 田德, 唐世泽, 等. 超大型风电机组叶片颤振分析及参数灵敏度研究[J]. 太阳能学报, 2023, 44(9): 295-301.
LI B, TIAN D, TANG S Z, et al.Flutter analysis and parameter sensitivity study of ultra-large wind turbine blades[J]. Acta energiae solaris sinica, 2023, 44(9): 295-301.
基金
国家重点研发计划（2023YFB4203100）; 15 MW级海上风电机组关键技术研究与应用——海上风电叶片结构建模与运动响应计算项目（202303070）
PDF(3553 KB)
