The analysis of three dimensional flow around a low-aspect-ratio control fin with end plate

Flow around the tip of control fin is fully three dimensional, and the prediction of lift on the control fin is essential in maneuvering a vehicle in an appropriate manner. Three dimensional flow effect on a low- aspect-ratio control fin is more obvious than on a moderate or high-aspect-ratio control fin. The three dimensional flow effect can be reduced by applying end plate. Through numerical simulations, we examine the flow field around a low-aspect-ratio control fin with and without end plate for different flap angles. The pressure, vorticity, lift and torque on the control fin are analyzed and compared to experiments.