Study on the Optimization Design of Lift Wing for High-speed Trains
High-speed-train(HSTW)is a model of new type high-speed train designed to increase operating speed while considering overall energy consumption and life cycle costs.It enhances the train's aerodynamic lift by adding lift wings,thereby reducing wear on the train wheel hubs.To design a lifting wing that adheres to existing high-speed railway constraints,this paper utilizes the Hicks-Henne wing parameterization method and genetic algorithm.It establishes an aerodynamic optimization method considering train shape and high-speed railway limit constraints,conducting wing optimization design using this method.A three-dimensional lifting wing model is designed,incorporating winglets based on the optimized wing model.The study reveals that the optimized airfoil obtained by this method increases the lift coefficient by 13％compared to the basic airfoil,with the drag coefficient remaining almost unchanged.The addition of winglets effectively reduces the aerodynamic drag of the lifting wing.Through a comparison of aerodynamic characteristics,an optimal lifting wing model with a camber angle of 15° and sweep angle of 30° is designed,achieving a maximum lift coefficient of 1.8247.
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