Synchrotron x-radiography and a novel fast x-ray detector are used to visualize the detailed, time-resolved structure of the fluid jets generated by a high pressure diesel-fuel injection. An understanding of the structure of the high-pressure spray is important in optimizing the injection process to increase fuel efficiency and reduce pollutants. It is shown that x-radiography can provide a quantitative measure of the mass distribution of the fuel. Such analysis has been impossible with optical imaging due to the multiple-scattering of visible light by small atomized fuel droplets surrounding the jet. In addition, direct visualization of the jet-induced shock wave proves that the fuel jets become supersonic under appropriate injection conditions. The radiographic images also allow quantitative analysis of the thermodynamic properties of the shock wave.
Shock Waves Generated by High-Pressure Fuel Sprays Directly Imaged by X-Radiography
Sae Technical Papers
Future Car Congress ; 2002
2002-06-03
Aufsatz (Konferenz)
Englisch
Shock waves generated by high-pressure fuel sprays directly imaged by x-radiography
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