【摘要】 振荡水柱装置作为海浪能转换的重要手段，其转换能力受Wells透平失速特性的限制。本文以带有NACA 0015叶型的单排Wells透平为研究对象，讨论了叶片前缘展向微圆柱参数在稳定入流下对透平性能的影响，揭示了微圆柱对透平失速特性和损失的作用机制。结果表明，微圆柱的尾迹增强了转子吸力面侧边界层内湍流强度和动量混合，有效地抑制了尾缘轮毂附近的初始分离。同时，叶顶间隙泄漏涡强度减小，削弱了叶顶泄漏流与吸力面侧流动的相互作用。随着圆柱半径增大，其尾迹涡涡量增大，能够进一步抑制流动分离，但圆柱尾迹耗散损失增大，导致透平效率进一步降低。当圆柱距前缘为10%C (叶片弦长)，圆柱半径为1%C时，峰值扭矩系数提高26.57%，对应流量系数增大19.15%。更多还原

【Abstract】 As an important means of wave energy conversion, Oscillating Water Column device is limited by the stall characteristics of Wells turbines. In this paper, a monoplane Wells turbine with NACA 0015 aerofoil profile is taken as the research object, and the influence of the spanwise leading-edge micro-cylinder parameters on the turbine performance under steady inflow conditions is discussed. The mechanism of micro-cylinders on the stall characteristics and losses of Wells turbine is revealed. The results indicate that the turbulent intensity and momentum mixing in the boundary layer on the suction side of the rotor are enhanced by the wake of the micro-cylinders. The initial separation near the hub of the trailing edge is effectively suppressed. Meanwhile, the strength of the tip leakage vortex reduces, which weakens the interaction between the tip leakage flow and suction passage flow. With the increase of cylinder radius, the cylinder wake vorticity increases, and the separated flow is further inhibited. However, the dissipation loss caused by cylinder wake leads to further reduction of turbine efficiency. When the distance between the cylinder and the leading edge is 10%C(blade chord length) and the cylinder radius is 1%C, the peak torque coefficient increases by 26.57% and the corresponding flow coefficient increases by 19.15%.更多还原