Aerodynamic characteristic analysis of wind turbine blades based on CSA-KJ airfoil optimization design

IF 0.7 Q4 ENGINEERING, MECHANICAL
Yiqing Xu, Jianping Zhang, Ming Liu, Pengju Zhang, Liquan Wang
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引用次数: 0

Abstract

In order to enable the offshore wind farm to produce electric energy efficiently, stably and economically, the optimization method of CSA-KJ airfoil is proposed, and the optimized CSA-KJ4412 airfoil is obtained, and the aerodynamic characteristics of the airfoil are compared and analyzed. Combined with Wilson method, the high-power CSAKJ4412-08 wind turbine blade is designed, the flow field characteristics of the blade under different working conditions are simulated and analyzed, and its power is verified. The results show that compared with the NACA4412 airfoil, the average lift-drag ratio coefficient and the maximum value of the CSA-KJ4412 airfoil increase. Meanwhile, the pressure distribution rises, and the aerodynamic characteristic is better. The fluid around CSAKJ4412-08 blade at different attack angles is attached to the blade surface tightly for adhesive flow, and no stall phenomenon is identified. The pressure on the suction and pressure surfaces for the optimized CSAKJ4412-08 blade shows an opposite trend as the wingspan in-creases, leading to an increase in the pressure difference between the upper and lower surfaces, thereby improving the lift of the blade. In the range of –30° to 30° attack angle, the power of CSAKJ4412-08 blade increases first and then decreases as the attack angle rises, and the ratio of the maximum power to the rated value reaches 71.38 %, indicating that the optimized CSAKJ4412-08 blade exhibits better aerodynamic characteristics. The relevant results can provide technical reference for the optimal design of wind turbine blades.
基于CSA-KJ翼型优化设计的风力机叶片气动特性分析
为了使海上风电场高效、稳定、经济地发电,提出了CSA-KJ翼型的优化方法,得到了优化后的CSA-KJ4412翼型,并对该翼型的气动特性进行了比较分析。结合Wilson方法,设计了大功率CSAKJ4412-08风力机叶片,对叶片在不同工况下的流场特性进行了仿真分析,并对其功率进行了验证。结果表明:与NACA4412翼型相比,CSA-KJ4412翼型的平均升阻比系数和最大值均有所增大;同时,压力分布增大,气动特性得到改善。CSAKJ4412-08叶片周围不同攻角的流体紧密附着在叶片表面进行粘接流动,未发现失速现象。优化后的CSAKJ4412-08叶片吸力面和压力面压力随翼展增大呈相反趋势,导致上下表面压差增大,从而提高叶片升力。在-30°~ 30°攻角范围内,随着攻角的增大,CSAKJ4412-08叶片的功率先增大后减小,最大功率与额定值的比值达到71.38%,说明优化后的CSAKJ4412-08叶片具有较好的气动特性。研究结果可为风力机叶片的优化设计提供技术参考。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Journal of Vibroengineering
Journal of Vibroengineering 工程技术-工程:机械
CiteScore
1.70
自引率
0.00%
发文量
97
审稿时长
4.5 months
期刊介绍: Journal of VIBROENGINEERING (JVE) ISSN 1392-8716 is a prestigious peer reviewed International Journal specializing in theoretical and practical aspects of Vibration Engineering. It is indexed in ESCI and other major databases. Published every 1.5 months (8 times yearly), the journal attracts attention from the International Engineering Community.
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