The aerodynamic characteristics of a ski jumper at the in-run phase

What is it about?

The aim of the study is to study the interactions between an athlete and the air environment and to find the aerodynamic characteristics of a ski jumper at the in-run phase based on the development of mathematical models. Methods and organization of the study: 8 highly qualified ski jumpers took part in the study. The study used instrumental methods of 3-D analysis Qualisys, AMTI tensoplatforms, TC2 3D Body Scanner NX-16 body scanner, FARO "Focus-3D" laser scanner, as well as FlowVision, SIMULIA Abaqus modeling packages. Results of the study and conclusions. In the course of the work, numerical models of aerodynamics of performing a ski jump in the in-run phase were created. Based on the results of calculating the air flow movement, friction forces on the model of the "athlete-ski" system, it is evident that the main contribution to the drag force for the three variants of the considered acceleration positions is made by the pressure force created by the skier's body, followed by the friction force also created by the athlete. The pressure and friction forces created by the skis at the the in-run phase are insignificant. It has been established that in order to reduce the drag force, it is necessary to pay more attention to reducing the pressure on the athlete than to reducing the friction force of the air flow.

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