Investigation to disposition scheme of 2DPIV field of view

In order to investigate the vector field of three-dimensional vortex separation flow at high angles of attack, an arrangement scheme of 2DPIV field of view was developed to reduce perspective error. And this scheme was applied to a two-vortex section of asymmetric vortex flow at high angles of attack. Direct comparison between 2DPIV and Stereoscopic PIV (SPIV) synchronous measurements was conducted. The results showed that the perspective errors of the vector components u and v were reduced from 14% and 18% respectively to below 5% by applying this scheme. Meanwhile, the measurement error of the vortex core position was in the range of the space resolution of the vector field.