Shock waves generated by high-pressure fuel sprays directly imaged by x-radiography.
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.
- Research Organization:
- Argonne National Lab., IL (US)
- Sponsoring Organization:
- US Department of Energy (US)
- DOE Contract Number:
- W-31-109-ENG-38
- OSTI ID:
- 795865
- Report Number(s):
- ANL/UPD/CP-106497; TRN: US0201623
- Resource Relation:
- Conference: 2002 Future Car Congress, Arlington, VA (US), 06/03/2002--06/05/2002; Other Information: PBD: 20 Dec 2001
- Country of Publication:
- United States
- Language:
- English
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