Flash soft radiography - its adapting to the study of breakup mechanisms of liquid jets into a high-density gas

Radiography of liquid fuel injection provides valuable information on the jet development, structure, propagation and disintegration which cannot be obtained optically, because often the jet core is hidden behind a curtain of spray droplets. Tests at increasing prepressures require thicker x-ray windows in the injection chamber which absorb already most of the transmitted soft x-rays. The technique encompasses a high-intensity flash soft x-ray generator with a pulse duration of 120 ns FWHM and a specially designed injection chamber. Various flash radiographs of liquid injection phenomena, taken at a prepressure of 1 and 100 bars, illustrate the achieved progress.