A concept for dynamic mixture formation investigations of fuel/air mixtures is presented which can equally be applied to several other laser induced fluorescence (LIF) applications. Double-pulse LIF imaging was used to gain insight into dynamic mixture formation processes. The setup consists of a modified standard PIV setup. The fuel/air ratio measurement by laser induced fluorescence (FARLIF) approach is used for a quantification of the LIF images in order to obtain pairs of 2D fuel/air ratio maps. Two different evaluation concepts for LIF double pulse images are discussed. The first is based on the calculation of the temporal derivative field of the fuel/air ratio distribution. The result gives insight into the dynamic mixing process, showing where and how the mixture is changing locally. The second concept uses optical flow methods in order to estimate the motion of fluorescence (i.e., mixture) structures to gain insight into the dynamics, showing the distortion and the motion of the inhomogeneous mixture field. 德國(guó)LaVision PIV/PLIF粒子成像測(cè)速場(chǎng)儀 汽車(chē)發(fā)動(dòng)機(jī)多參量測(cè)試系統(tǒng) PLIF平面激光誘導(dǎo)熒光火焰燃燒檢測(cè)系統(tǒng)