Numerical Simulation And Aerodynamic Performance Comparison between Seagull Aerofoil and NACA 4412 Aerofoil under Low-Reynolds


Xin Hua1,3, Rui Gu2 , Jingfu Jin1 ,Yirong Liu1 ,Yi Ma1 , Qian Cong1 ,Ying Zheng3 1 Key Laboratory of Bionic Engineering (Jilin University), Ministry of Education, P.R.China 294,710 People's Liberation Army troop 3Aviation University of Air Force,P.R.China


For the aerofoil of small wind turbine working under the conditions of low-Reynolds, the aerodynamic performance of seagull aerofoil and NACA 4412 is contrastively analyzed by the Fluent while the Reynolds-Number is ,1× 105,3 × 105 and 6 ×10 5. The numerical simulation comparison shows that, when the attack-angle range is 0°~20°, the life-coefficient of seagull aerofoil increased by 24.97%、46.02% and 48.54% compared to NACA 4412 respectively ; when the attack angle is 4°, the lift-drag ratio of seagull aerofoil increased by 40.44%、43.14% and 39.40% compared to NACA 4412 respectively. Under the condition of Reynolds-Number is 6 ×105 , the normal working range of attack angle of seagull aerofoil increased by 16.7% compared to NACA 4412 .Under the same simulation condition, the separation point of NACA4412 aerofoil is closer to the leading-edge than seagull aerofoil . The analysis shows that the unique distribution of the thickness and the camber of the seagull aerofoil is the main reason of the better aerodynamic characteristics under the Low-Reynolds.


Low-Reynolds, wind turbine, aerofoil, numerical simulation, aerodynamic characteristics


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