针对新型可变偏心距风力机,通过数值模拟及实验测试的方法,研究偏心距离对风轮、塔筒及侧偏调节机构受力的影响。结果表明,在来流风速增大的条件下,可变偏心距风力机通过增大偏心距可减小叶片受力,风轮向右侧偏心100 mm时叶片最大应力是未偏心工况的86%;随着偏心距离的增大,塔筒在俯仰方向受力增长趋势放缓,受风轮偏转角增大的影响,塔筒在侧弯方向受力处于持续增大的状态;在向右偏心距离增大的过程中,风轮侧偏调节机构应力及应变逐渐向右侧集中,最大应力、应变始终处于中间部位,结果验证了偏心距调节方式的可行性及安全性。
Abstract
For the new variable eccentric distance wind turbine, the influence of eccentric distance on the force of wind turbine, tower barrel and side-bias regulation mechanism is studied by numerical simulation and experimental testing. The results show that under the condition of increasing the inflow wind speed, the variable eccentric distance wind turbine can reduce the blade force by increasing the eccentric distance. The maximum stress on the blade at the right eccentric distance of 100 mm is 86% of the uneccentric distance of the wind turbine. As the eccentric distance increases, the trend of force growth in the tilt direction of the tower slows down. Influenced by the increase of the angle of the wind wheel, the pressure of the tower barrel in the direction of the side bend is continuously increasing. In the process of increasing the distance to the right eccentricity, the stress and strain of the side adjustment mechanism of the wind wheel gradually concentrate to the right, and the maximum stress and strain are always in the middle area. The results verify the feasibility and safety of eccentric distance regulation methode.
关键词
风力机 /
应力 /
气动力 /
数值模拟 /
偏心距 /
载荷
Key words
wind turbines /
stress /
aerodynamics /
numerical simulation /
load /
eccentric distance
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基金
内蒙古自治区自然科学基金（2020MS05032）
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