Abbasi Sarallah, Daraee Mohammad Amin
Mechanical Engineering Department, Arak University of Technology, Arak, Iran.
Sci Rep. 2024 Aug 8;14(1):18425. doi: 10.1038/s41598-024-69455-8.
Controlling wind flow on vertical axis wind turbine blades is an effective technique for enhancing their performance. Modern equipment such as plasma actuators have gained significant attention for their ability to control, and improve the flow behavior in wind turbines. Previous studies have primarily focused on investigating plasma actuators with constant force. In this study, plasma actuators with varying forces over time were applied to the turbine blades. An unsteady 2D model was used to analyze the wind turbine. The sliding mesh model was employed to simulate rotor rotation, and the SST model was utilized for turbulence modeling. Initially, the performance of the clean turbine was examined. In the next step, the plasma actuators with different force waveforms were applied to the wind turbine blades, including constant, sine, cosine, positive ramp, negative ramp, pulse in the first half-cycle, and pulse in the last half-cycle waveforms. The results indicated that the cosine, and sinusoidal waveforms, led to the greatest improvement with 37.28% and 35.59% increase in the net energy produced by the turbine, respectively, compared to the baseline case.
控制垂直轴风力涡轮机叶片上的风流是提高其性能的有效技术。诸如等离子体致动器等现代设备因其控制和改善风力涡轮机内流动行为的能力而备受关注。以往的研究主要集中在研究具有恒定力的等离子体致动器。在本研究中，将随时间变化力的等离子体致动器应用于涡轮机叶片。使用非定常二维模型来分析风力涡轮机。采用滑动网格模型来模拟转子旋转，并利用SST模型进行湍流建模。最初，研究了清洁涡轮机的性能。接下来，将具有不同力波形的等离子体致动器应用于风力涡轮机叶片，包括恒定、正弦、余弦、正斜坡、负斜坡、前半周期脉冲和后半周期脉冲波形。结果表明，与基线情况相比，余弦和正弦波形使涡轮机产生的净能量分别增加了37.28%和35.59%，带来了最大的改善。
