Nozzle geometry and injection duration effects on diesel sprays measured by x-ray radiography.
X-ray radiography was used to measure the behavior of four fuel sprays from a light-duty common-rail diesel injector. The sprays were at 250 bar injection pressure and 1 bar ambient pressure. Injection durations of 400 {micro}s and 1000 {micro}s were tested, as were axial single-hole nozzles with hydroground and nonhydroground geometries. The X-ray data provide quantitative measurements of the internal mass distribution of the spray, including near the injector orifice. Such measurements are not possible with optical diagnostics. The 400 {micro}s sprays from the hydroground and nonhydroground nozzles appear qualitatively similar. The 1000 {micro}s spray from the nonhydroground nozzle has a relatively consistent moderate width, while that from the hydroground nozzle is quite wide before transitioning into a narrow jet. The positions of the leading- and trailing-edges of the spray have also been determined, as has the amount of fuel residing in a concentrated structure near the leading edge of the spray.
- Research Organization:
- Argonne National Lab. (ANL), Argonne, IL (United States)
- Sponsoring Organization:
- EE
- DOE Contract Number:
- DE-AC02-06CH11357
- OSTI ID:
- 927994
- Report Number(s):
- ANL/ES/JA-60239; JFEGA4; TRN: US200816%%938
- Journal Information:
- J. Fluids Eng., Vol. 130, Issue Apr. 2008; ISSN 0098-2202
- Country of Publication:
- United States
- Language:
- ENGLISH
Similar Records
Effect of nozzle orifice geometry on spray, combustion, and emission characteristics under diesel engine conditions.
Determination of diesel spray axial velocity using x-ray radiography.