摘要
首先,针对阵列式涡流发生器(VGs)参数化模型,考虑VG叶片附着涡和尾随涡间的相互诱导作用,给出新的最大涡环量计算方法,以提高加VGs叶片的CFD模拟的精度和效率。研究结果显示:该模型最大环量值计算精度较单VG叶片模型有明显的提高。然后,采用Lamb-Oseen涡模型模拟VGs脱落涡结构,分析涡源项位置、涡核位置、涡半径等关键参数的确定方法,分析得出在VGs下游2c处添加源项更加合适;涡核在高度方向设于65%h、在横向设于VGs尾缘处较为适宜,并给出涡半径与攻角的关系。基于以上参数,通过4个间距、4个攻角共16个算例对实体模型和参数化模型展开CFD研究,结果对比分析发现:两者计算得出的环量随攻角的变化曲线非常接近,平均误差为13.15%,18°~24°攻角下平均误差仅约为5%;两模型得到的脱落涡诱导速度分布曲线吻合良好,但最大诱导速度在大攻角和大间距时出现一定偏离。
Firstly,considering the interaction between VGs blades,parametric modelling for a pair of vortex generators(VGs)was developed to improve the accuracy and efficiency of the CFD simulation of the blades with VGs,which provides a new method for calculating the maximum circulation of the vortex.The results of research showed that the accuracy of the maximum circulation calculating from this model has an obvious improvement than that of models for single VG blade.Secondly,the Lamb-Oseen vortex model was used to simulate the structure of the shedding vortex of the VGs during which the key parameters are analysed.Such as the positions of the source terms of the shedding vortex,the positions of the vortex core,the radius of the shedding vortex and so on.It is concluded that adding source items at 2 c in the downstream of VGs is more suitable;the vortex core at the trailing edge and 65%h of the VGs is more suitable;the relationship between the radius of the vortex and the angle of attack is also given.Based on the above parameters,the CFD research on the solid model and parametric model were performed at 16 cases including 4 gaps and 4 angles of attack.The results from comparison shown that the circulation calculated from these two methods versus angles of attack are very close,the average error is about 13.15%and the average error is only about 5%with 18°<α<24°.The induced velocity distribution curves getting from the two models are in good agreement,but the maximum induced velocity deviates to a certain extent under the large angles of attack and large gaps.
作者
赵振宙
苏德程
王同光
汪瑞欣
郑源
许波峰
Zhao Zhenzhou;Su Decheng;Wang Tongguang;Wang Ruixin;Zheng Yuan;Xu Bofeng(College of Energy and Electric Engineering,Hohai University,Nanjing 211100,China;Key Laboratory of Wind Energy and Solar Energy Technology,Inner Mogolia University of Technology,Hohhot 010051,China;Jiangsu Key Laboratory of Hi-Tech Research for Wind Turbine Design,Nanjing University of Aeronautics&Astronautics,Nanjing 210016,China)
出处
《太阳能学报》
EI
CAS
CSCD
北大核心
2021年第5期415-422,共8页
Acta Energiae Solaris Sinica
基金
风能太阳能利用技术教育部重点实验室开放基金(20182D05)
国家自然科学基金(51876054
11502070)。
关键词
风力机
涡流发生器
涡脱落
数值模拟
参数化模型
wind turbines
vortex generators
vortex shedding
numerical simulation
parametric model
