Visualization of Vaporized Kerosene Combustion in a Supersonic Combustor Using Pulsed Schlieren System

A pulsed schlieren system using a nanosecond-flashlamp has been developed to study the flow-field of supersonic combustion.A high speed camera was used to capture the instantaneous flow structures.The camera and the flash-lamp source were synchronized using a pulse generator.Due to the extremely high luminous density of the spark, the background illumination has been suppressed effectively with an exposure time of order of microsecond.The instantaneous schlieren images of injection and combustion of pilot hydrogen and vaporized kerosene in a Ma 2.5 combustor have been captured and analyzed.