Nozzle geometry and injection duration effects on diesel sprays measured by x-ray radiography.

Journal Article · Tue Apr 01 04:00:00 EDT 2008 · J. Fluids Eng.

DOI:https://doi.org/10.1115/1.2903516· OSTI ID:927994

Kastengren, A L; Powell, C F; Riedel, T; Cheong, S -K; Im, K -S; Liu, X; Wang, Y J; Wang, J; GmbH, Robert Bosch

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 Laboratory (ANL)
• Sponsoring Organization: EE
• DOE Contract Number: AC02-06CH11357
• OSTI ID: 927994
• Report Number(s): ANL/ES/JA-60239
• Journal Information: J. Fluids Eng., Journal Name: J. Fluids Eng. Journal Issue: Apr. 2008 Vol. 130; ISSN 0098-2202; ISSN JFEGA4
• Country of Publication: United States
• Language: ENGLISH

Related Subjects

33 ADVANCED PROPULSION SYSTEMS
DESIGN
DIESEL FUELS
FUEL INJECTION SYSTEMS
MASS DISTRIBUTION
NOZZLES
SPRAYS
X-RAY RADIOGRAPHY