Document Type



The purpose of this study was to construct a simulation framework for predicting unsteady aerodynamic characteristics in ski jumping competition. Here, we focused on from takeoffs to the early flight phase in which transient characteristics are expected to greatly affect the distance traveled. For the purpose of applying the developed framework to actual competition, the posture change was reconstructed from the sagittal plane obtained from the video image and simulation was performed. Moreover, in order to examine the validity of the result, it is compared with the simulation result obtained from the three-dimensional motion measured by the motion capture at the same time. In fluid simulation, we developed a finite volume method based on a hierarchical Cartesian grid for the purpose of reproducing complicated posture changes and obtaining results at high speed.