Numerical Researches on the Aerodynamic Characteristics of a Wing Influenced by the Slipstream of Propellers

A configuration of a semi-span wing combined with a four-bladed propeller on certain conditions(at a free stream velocity of 540km/h,propeller rotation of 1075r/min and advance ratio of 1.86)was numerically simulated by solving unsteady RANS(Reynolds averaged Navier-Stokes)equations in order to research the flow field interactions.The computations were performed with the unstructured mesh(total amount of the mesh was 10 million and sliding mesh was 3 million in each propeller area)and numerical results were analyzed at different angles of attack.It was found that:(1)the thrust of the propeller was influenced by the jam effect of the wing;(2)the aerodynamic characteristics of the wing were influenced by the propeller at different angles of attack.Lift enhancement of the wing by the propeller slipstream was significant at high angles of attack;(3)slipstream increased drag of the wing at different angles of attack.