摘要
文章通过水槽实验,研究了雷诺数为1.2×105,1.6×105和2.2×105时,采用NACA0018翼型的标准直叶片和带前缘突起的仿生叶片的水力学性能。实验结果表明:在3个不同雷诺数下,迎角小于33°时,标准叶片在失速时出现升力系数的忽然减小和阻力系数的忽然增加;带前缘突起的仿生叶片能够推迟叶片失速的发生,且在失速区域,仿生叶片比标准叶片的升力系数提高约9.4%,阻力系数减小约22.75%,升阻比提高约33.6%;前缘突起不仅能够为仿生叶片在失速区域提供更大的升力,而且可以起到减阻的效果。实验证明了仿生叶片在失速区域比标准叶片有更好的水力学性能。
In this paper,flume experiments are carried out to investigate the hydrodynamics performance of a baseline straight blade and a bionic blade at Reynolds numbers 1.2×105,1.6×105,and 2.2 ×105.The airfoil of the baseline blade,as well as the average cross-section of the bionic blade,is NACA0018.The experiments show that in the range of angle of attack less than 33 °,and at all the mentioned three Reynolds numbers,the baseline blade experience a sudden drop in the lift coefficient and a steep climbing in the drag coefficient when stall occurs.Whilst the bionic blade with leading-edge protuberances delay the stall occurrence.In post-stall regime,the bionic blade＇s lift coefficient,drag coefficient,and lift-drag ratio increased by 9.4%,decreased by22.75%,and increased by 33.6%,respectively,in comparison with that of the baseline blade.The study shows that the leading-edge protuberances create greater lift on the bionic blade,and reduce the drag in post-stall regime,therefore the bionic blade performs better than the baseline straight blade in the sense of hydrodynamic characteristics in post-stall regime.
作者
刘清照
陈兵
王利东
苏少帅
Liu Qingzhao;Chen Bing;Wang Lidong;Su Shaoshuai(School of Ocean Science and Technology, Dalian University of Technology, Panjin 124221, China)
出处
《可再生能源》
CAS
北大核心
2018年第4期611-616,共6页
Renewable Energy Resources
基金
国家自然科学基金项目(51379036)
关键词
仿生叶片
延迟失速
雷诺数
水动力学性能
bionic blade
delay stall
reynolds number
hydrodynamic performance
