抄録
The accuracy of 3-D Kalman filter PIV in high-particle-concentration flow fields is quantitative-ly investigated. 3-D PIV measurements with many "ghosts" are numerically simulated for accuracy tests. The number of time steps considered in Kalman filter particle tracking is increased in order to exclude ghosts, which makes it difficult to improve spatial resolution of 3-D PIVs. It was confirmed that by increasing the number of time steps, the particle trackability of the 3-D Kalman filter PIV was maintained and the ghost exclusion rate was markedly improved, even when the particle concentration in a measuring region was dense. As a result, 3-D measurements with higher spatial resolution can be attained by means of Kalman filter particle tracking more than four time steps.
