Numerical and experimental studies of hydrodynamic performance of bionic leading-edge tubercle airfoil  

作　　者：Chun-yu Guo Zuo-tian Zhang Xu-xiang Cao Tie-cheng Wu Yu-min Su 

机构地区：[1]College of Shipbuilding Engineering,Harbin Engineering University,Harbin 150001,China

出　　处：《Journal of Hydrodynamics》2019年第6期1240-1249,共10页水动力学研究与进展B辑（英文版）

基　　金：Project supported by the National Natural Science Foundation of China(Grant Nos.41176074,51409063 and 51209048);the Fundamental Research Funds for the Central Universities(Grant No.P013513013).

摘　　要：This paper studies the bionic tubercle airfoils based on the NACA 0020 prototype airfoil,with 7 models derived from different designs of the span-chord ratios and different tubercle types,along with the option of the wave airfoil surface matching the leading-edge tubercle.Open water experiments are conducted to test the airfoil profile at a Reynolds number of 3×10^5 and an angle of attack of 0°-30°.Data are recorded by a four-component force balance and the resulted lift,drag,and force moment are analyzed.From the analysis of the hydrodynamic characteristics and the flow field characteristics,it is shown that the stall of the tubercle airfoils is milder without an evident stalling angle as compared with that of the normal airfoil profile.The lift coefficient of the optimized airfoil is significantly elevated at the angle where the NACA 0020 airfoil is in the stall condition.The lift-drag ratio is also markedly improved at the same angle.The optimal airfoil profile is finally identified and a further optimization plan is proposed based on the comparison results against the CFD numerical simulation.

关 键 词：BIONIC tubercle computational fluid dynamics STALL 

分 类 号：V21[航空宇航科学与技术—航空宇航推进理论与工程]