学术论文

      基于 Floquet 理论的旋转风机叶片动力失速气弹稳定性研究

      Aeroelastic stability analysis on rotating stall blade of wind turbine based on floquet theory

      摘要:
      研究旋转风力机叶片动力失速气弹稳定性问题。叶片结构采用标量化的挥舞和扭转自由度耦合的振动运动模型,旋转风机叶片的气动力由 Beddoes-Leishman 失速模型来模拟,通过攻角在深度失速区域内的变化来计算出周期时变的非线性气动失速负载。在系统静平衡点附近对非线性气弹系统进行线性化,采用 Floquet 理论分析旋转叶片动力失速气弹稳定性,其结果得到系统时域响的验证。通过数值分析,揭示了挥舞扭转固有频率比和结构阻尼对颤振边界的影响。
      Abstract:
      The aeroelastic stability of a rotating wind turbine blade under stall-induced vibration was studied.The blade structure was modelled as a normalized vibration system with a coupled motion between the two degrees of freedom of flapwise and torsional deflections.The periodic time-varying aerodynamic force on the rotating blade was determined by using the Beddoes-Leishman dynamic model via the computation of nonlinear aerodynamic stall load according to the variation of angle of attack in deep-stall range.Based on a linearized aeroelastic system,the aeroelastic stability of the rotating stall blade was analyzed in according with the Floquet theory,and the results were verified by comparing the system responses in time domain.It also reveals the effect of the ratio of flapwise to torsional natural frequencies and the structural damping on the flutter boundary.
      作者: 李迺璐 [1] 穆安乐 [2] Balas MJ [3]
      Author: LI Nai-lu [1] MU An-le [2] BALAS MJ [3]
      作者单位: 扬州大学 水利与能源动力工程学院,江苏 扬州,225127 西安理工大学 机械与精密仪器工程学院,西安,710048 美国安柏瑞德航空航天大学 航空学院,美国 32114
      刊 名: 振动与冲击 ISTICEIPKU
      年,卷(期): 2015, (24)
      分类号: TK83
      机标分类号: V32 TH1
      在线出版日期: 2016年1月18日
      基金项目: 江苏省高校自然科学研究面上项目(14KJB480006);教育部留学回国人员科研启动基金资助项目;扬州大学科技创新培育基金(2014CXJ028);国家自然科学基金(51075326);美国能源部项目