方案详情文
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.
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