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The flow fields of single airfoil model and symmetry airfoil model were simulated by CFD software in this paper. the different inducing velocity and the airfoil intervals were considered to study the flow field and the induction rate change of the models. The results show that the induction rates of the single airfoil model and the symmetry airfoil model enlarge when the inducing velocity increases,and gradually reaching a steady value .As interval of the symmetry airfoil model is increased, the induction rate increases.The air flow from the narrow slits of symmetry model can be mixed and disturbed each other.Therefore, the induction rate of symmetry airfoil model is not a simple superposition of the single airfoil model under the same inducing velocity . Induction rate and airfoil interval are the key factors to optimize the airfoil model.

Numerical Analysis of Inducing Airflow Characteristics on the Airfoil Model Based Coanda Effect