基于数值模拟的阻力转子风力发电机叶片近流场特性分析
摘要:为了提高阻力转子风力发电机的自启动性能和风能利用率，构建扭转角度为90°扭曲叶片，并基于非定常雷诺平均N-S模型和k-ω SST湍流模型，对扭曲叶片自启动到稳态运行过程进行了数值模拟，评估风力机近流场特征对转子性能影响。结果表明：扭转角度为90°扭曲叶片可以适应不同来流方向，这种翼型不仅提高了不同环境的适用性，而且还提高了自启动能力；同时，扭曲翼型可以有效防止流体从前向叶片和回流叶片的凹侧尖端逸出，有利于保持叶片凹凸两侧的压力差，并相应地增加能量转换；在回流叶片和前向叶片的叶尾均发现涡流，这种周期性的涡旋脱落易导致转子结构的振荡，诱发结构的疲劳失效。研究结论可为扭转式叶片的阻力转子风机研发提供有益的帮助。
Abstract：In order to improve the self-starting performance and wind energy efficiency of a wind turbine with a drag rotor, a twisted blade with a torsion angle of 90° was constructed. Based on the unsteady reynolds mean N-S model and k-ω SST turbulence model, the process from self-starting to steady-state operation of the twisted blade was numerically simulated, and the influence of the characteristics of the wind turbine near-flow field on the rotor performance was evaluated. The results show that the twisted blades with torsion angle of 90° can adapt to different flow directions. This kind of airfoil not only improves the applicability of different environments, but also improves the self-starting ability. At the same time, the distorted airfoil can effectively prevent the fluid from escaping from the concave tip of the forward blade and the return blade, which is beneficial to maintain the pressure difference between the concave and convex sides of the blade and correspondingly increase the energy conversion. Eddy currents were found at the tail of both the reflux blade and the forward blade, and such periodic eddy shedding could easily lead to the oscillation of the rotor structure and induce the fatigue failure of the structure. The research results can provide useful help for the development of resistance rotor fans with torsional blades.
标题：基于数值模拟的阻力转子风力发电机叶片近流场特性分析
title:Analysis of Near Flow Field Characteristics of Resistance Rotor Wind Turbine Blades Based on Numerical Simulation
作者：唐潘宇,吴俊杰,肖祥,秦子祥,谢占山,田乾,程海正,宋晨光
authors:TANG Panyu,WU Junjie,XIAO Xiang,QIN Zixiang,XIE Zhanshan,TIAN Qian,CHENG Haizheng,SONG Chenguang
关键词：Savonius,湍流模型,压力场,扭曲叶片,数值模拟,
keywords:Savonius,turbulence model,pressure field,twisted blades,numerical simulation,
发表日期：2023-03-31
- 文件大小:
- 8.09 MB
- 下载次数:
- 60
-
高速下载
|
|
