Two-line tracer LIF for measurements of instantaneous temperature fields in inhomogeneously mixed systems
In: 17th International Colloquium on the Dynamics of explosions and reactive systems ICDERS, paper No. 121
Buchaufsatz / Kapitel / Fach: Maschinenbau
Transient two-dimensional temperature distributions in the compression stroke and in the unburned end-gas of an SI engine were measured employing laser-induced fluorescence (LIF) of a fuel marker that possesses strongly temperature-dependent spectroscopic properties. The use of two different excitation wavelengths simplifies the otherwise complicated relation between LIF signal intensity and system parameters. The temperature fields obtained in this manner can be used to correct measured tracer-LIF maps and thus help to determine fuel distributions.