摘要
寒区海上风力机叶片积冰将显著降低其气动性能和输出功率。选取NREL 5 MW海上风力机为研究对象,联合应用软件FLUENT和FENSAP-ICE对结明冰状态下的风力机叶片开展气动性能研究,分析积冰对翼型压力系数、流场升力系数和阻力系数的影响。研究结果表明,在结明冰的条件下,翼型前部压力系数出现振荡,低压面上的压力系数比洁净翼型高,而高压面上的压力系数比洁净翼型低。明冰使翼型上表面高速区向前偏移,最高速度出现在明冰的棱角处,而且在尾部出现了分离旋涡,影响了整个流场。在积明冰的情况下翼型升力系数降低约16.9%,阻力系数增加约13.4%,升阻比降低约26.7%。
Ice accretion on blades of the wind turbine can greatly reduce its aerodynamic performance and output power.The NREL 5MW wind turbine was taken as the research object,and the software FLUENT with the combination of the software FENSAP-ICE is applied to analyze aerodynamic characteristics of icing blades under glaze ice state.Aerodynamic characteristics of blades with glaze ice are studied such as pressure coefficient,flow field and lift-drag coefficient.The results show that under the condition of glaze ice,pressure coefficient at the front of the airfoil is oscillated,and pressure coefficient on the low-pressure surface of the airfoil is higher than that of the clean airfoil,and pressure coefficient of the high-pressure surface is lower than that of the clean airfoil.High-speed area on the upper surface of the airfoil is displaced forward due to the glaze ice,and the highest speed appears on the edge of the glaze ice together with separation vortex occurred at the tail,which affects the flow field significantly.Lift coefficient and drag coefficient of the airfoil are reduced by about 16.9%and increased by about 13.4%respectively,and lift-to-drag ratio of the airfoil is reduced by about 26.7%under the glaze ice condition.
作者
白旭
杜越
曹慧清
MA Xiandong
尹群
BAI Xu;DU Yue;CAO Huiqing;MA Xiandong;YIN Qun(School of Naval Architecture&Ocean Engineering,Jiangsu University of Science and Technology,Zhenjiang 212003,China;The Department of Engineering,Lancaster University,Lancaster LA14YW,U.K)
出处
《中国造船》
EI
CSCD
北大核心
2023年第1期34-46,共13页
Shipbuilding of China
基金
国家自然科学基金项目(51879125)
江苏省高校自然科学研究重大项目(18KJA580003)
江苏省六大人才高峰高层次人才项目(2018-KTHY-033)
关键词
海上风力机
积冰
明冰
压力系数
升、阻力系数
offshore wind turbine
blade icing
glaze ice
pressure coefficient
coefficients of lift and drag
