カルマンフィルタ型PIVの粒子追跡性能向上に関する基礎的研究

概要

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A new algorithm for particle tracking has been developed in order to improve its trackability for flows in which considerable acceleration acts locally. This algorithm consists of two main stages. At the first stage, the particle tracking method using the Kalman filter "type P" is applied in order to estimate individual particle states ; then the measuring region is divided into subregions for the purpose of evaluating local statistics of the particle velocity and acceleration. At the second stage, a new type of Kalman filter which can take account of the local acceleration statistics is applied to tracking particles. Numerical simulations using a 2-D cavity flow are performed for accuracy tests of the present algorithm. As a result, it is proved that the present method achieves measurements with sufficient precision even when the flow direction changes rapidly due to the effect of large acceleration.
一般社団法人日本機械学会の論文
1993-04-25