On the Visualization of Three-Dimensional Vortical Structures in the Wake behind a Road Vehicle by PIV Measurements
PIV 측정을 통한 자동차 후류 3차원 와구조의 정량적 해석
Abstract
Three-dimensional vortical structures in the wake behind a road vehicle has been visualized with the help of two-dimensional PIV measurement data. A three-dimensional velocity field has been reconstructed from several sectional measurement data in the x-y, y-z and z-x planes. Isovorticity surface observed by stacking only the sectional data in each plane, does not show the vortical structures within the recirculation region but represents only the strong shear flows. Thus, in the present study, the velocity component normal to the x-y plane is obtained by interpolating those velocities in the z-x plane. Then, a
Keywords