The auto-ignition of a pulsed methane jet in the hot exhaust gas of a hydrogen/air flat flame and the following flame kernel development have been studied with high-speed laser and imaging techniques. The downstream location of the auto-ignition and the ignition time were determined with OH* chemiluminescence, as well as the lift-off height of the stably burning jet flame. Further details of the ignition were characterized by using simultaneous planar laserinduced fluorescence of OH. A third camera, looking at the jet from a different viewing angle was used to gain three-dimensional information about the ignition kernel location. PLIF平面激光誘導(dǎo)熒光火焰燃燒檢測(cè)系統(tǒng)