张旭,李伟,邢静忠.相对弯度对钝尾缘改型提升翼型气动性能的影响[J].农业机械学报,2014,45(8):214-219.
Zhang Xu,Li Wei,Xing Jingzhong.Effect of Relative Camber on Improving Airfoil Aerodynamic Performance by Blunt Trailing-edge Modification[J].Transactions of the Chinese Society for Agricultural Machinery,2014,45(8):214-219.
摘要点击次数: 2998
全文下载次数: 1679
相对弯度对钝尾缘改型提升翼型气动性能的影响   [下载全文]
Effect of Relative Camber on Improving Airfoil Aerodynamic Performance by Blunt Trailing-edge Modification   [Download Pdf][in English]
投稿时间:2013-09-22  
DOI:10.6041/j.issn.1000-1298.2014.08.034
中文关键词:  风力机  相对弯度  钝尾缘改型  气动性能  增升效果
基金项目:天津市自然科学基金青年资助项目(13JCQNJC07000)、天津市高等学校科技发展基金资助项目(20130425)和国家自然科学基金资助项目(11102134)
作者单位
张旭 天津工业大学天津市现代机电装备技术重点实验室 
李伟 天津城建大学 
邢静忠 天津工业大学天津市现代机电装备技术重点实验室 
中文摘要:研究不同弯度的风力机专用翼型修改前后的气动性能,揭示相对弯度对钝尾缘改型增升效果的影响规律。利用XFOIL软件,对低速翼型S809、S823和S830进行尾缘厚度对称分布的钝尾缘改型。采用S-A和k-ω SST湍流模型模拟翼型原型的气动性能,并用实验数据比较两模型的计算精度。进而基于精度较高的k-ω SST湍流模型,计算了修改后翼型的升、阻力系数、升阻比和三者增幅,以及翼型表面压力系数分布。结果表明:对低速翼型进行钝尾缘改型时,随相对弯度增大,升力系数增幅在一定攻角范围内先增大后减小,升阻比增幅在一定攻角之前呈递增趋势;相对弯度约为2.5%弦长的翼型增升效果最佳,且大弯度翼型不适合钝尾缘改型。
Zhang Xu  Li Wei  Xing Jingzhong
Tianjin Key Laboratory of Advanced Mechatronics Equipment Technology, Tianjin Polytechnic University;Tianjin Chengjian University;Tianjin Key Laboratory of Advanced Mechatronics Equipment Technology, Tianjin Polytechnic University
Key Words:Wind turbine  Relative camber  Blunt trailing-edge modification  Aerodynamic performance  Lift enhancement effect
Abstract:The aerodynamic performance of original and modified airfoils with different camber for wind turbine was studied. The effects of relative camber on lift enhancement effect of blunt trailing-edge modification were revealed. The low-speed airfoil S809, S823 and S830 were modified to blunt trailing-edge airfoils of symmetrical trailing-edge thickness by XFOIL. The aerodynamic performance of original airfoils was simulated with S-A and k-ω SST turbulence model, respectively. And the numerical results were compared with the experimental data. Based on k-ω SST turbulence model with higher accuracy, the lift and drag coefficients, lift-drag ratios, their increments and airfoil surface pressure distributions of modified airfoils were calculated. The results showed that when the relative camber increased, the increment of lift coefficient increased first and then decreased in a certain range of attack angle, and the increment of lift-drag ratio increased before certain attack angle for blunt trailing-edge modification airfoils. The modified airfoil, whose relative camber was about 2.5% chord length, had the best lift enhancement effect, and the airfoil with large camber was unsuitable for the blunt trailing-edge modification.

Transactions of the Chinese Society for Agriculture Machinery (CSAM), in charged of China Association for Science and Technology (CAST), sponsored by CSAM and Chinese Academy of Agricultural Mechanization Science(CAAMS), started publication in 1957. It is the earliest interdisciplinary journal in Chinese which combines agricultural and engineering. It always closely grasps the development direction of agriculture engineering disciplines and the published papers represent the highest academic level of agriculture engineering in China. Currently, nearly 8,000 papers have been already published. There are around 3,000 papers contributed to the journal each year, but only around 600 of them will be accepted. Transactions of CSAM focuses on a wide range of agricultural machinery, irrigation, electronics, robotics, agro-products engineering, biological energy, agricultural structures and environment and more. Subjects in Transactions of the CSAM have been embodied by many internationally well-known index systems, such as: EI Compendex, CA, CSA, etc.

   下载PDF阅读器