叶片尾缘喷气的垂直轴风力机气动性能研究  

Aerodynamic performance of a vawt by trailing edge jet on the blade

作　　者：王建明[1] 谭永志[1] 温学兵[2] 申振华[1] 

机构地区：[1]沈阳航空航天大学辽宁省航空推进系统先进测试技术重点实验室,沈阳110136 [2]沈阳师范大学学报编辑部,沈阳110136

出　　处：《渤海大学学报（自然科学版）》2013年第4期386-392,共7页Journal of Bohai University:Natural Science Edition

基　　金：辽宁省项目(No:20102177)

摘　　要：风力机叶片是使风能转化为机械能的原动机构,是风力机的重要部件.风力机风能利用系数的高低主要取决于其叶片的做功能力.针对直叶片垂直轴风力机使用的NACA0022翼型,在翼型尾缘处开1 mm宽的窄缝,沿弦线方向喷气,以期改变流场进而提高风力机风能利用系数.利用Fluent软件采用k-ωSST湍流模型和SIMPLE算法,运用滑移网格技术,对风力机进行数值计算.得到采用尾缘喷气叶片的风力机的风能利用系数增大,而且处于高风能利用系数的尖速比范围更宽;在尖速比为2.06时其风能利用系数最高,其值为22.4%,此时的风能利用系数较基本型时提高了15.5%.叶片尾缘喷气提高风机性能的物理机制是尾缘喷气的扰动向上游传递改变了大攻角情况下叶片的表面压力系数.The rotor of wind turbine is a driving mechanism , and it is the important component of wind tur-bine .Aerodynamic performance of a wind turbine lies on airfoil of the blade .Keeping the baseline airfoil of NA-CA0022 usually used in vertical axis wind turbine , we made a 1 mm wide slot in the tail of blade in order to get better performance of the wind turbine .Vertical axis wind turbines were simulated numerically , the k-ωSST turbulence model and SIMPLE algorithm were chosen , and sliding mesh technique was applied .The coefficient of power of the VAWT by trailing edge blowing of the blade is larger , and the range with better aerodynamic per-formance widens.When the tip speed ratio equals 2.06, the coefficient of power is largest .The largest CP e-quals 22.4%, which increases by 15.5% in contrast to baseline case .The mechanism of optimum is that the passive jet from the slot can alter the coefficient of pressure on the surface of blade at large attack angle .

关 键 词：垂直轴风力机 气动性能 尾缘喷气 压力系数 

分 类 号：TK83[动力工程及工程热物理—流体机械及工程]