A SIMPLE DIGITAL MULTILEVEL STREAK IMAGE OF COMBUSTION

A method of a digital streak photography of combustion or a detonation process is described. The streak image is reconstructed from binary w ords produced by an ordered set of sensors which monitor the process. The temporal and spatial resolution of the process is increased by a q uick periodic changing of threshold levels used for the analog-digital conversion of the sensor signals. The multilevel digitization gives a measure of signal intensity with time. The proposed streak-photograph -like projection of the flame position has been used to visualize the condition of the burning fuel in long pipes. (C) 1996 American Institu te of Physics.