The internal structure of diesel fuel injectors is known to have a significant impact on the steady-state fuel distribution within the spray. However, little experimental or computational work has been performed on the dynamics of fuel injectors. Recent studies have shown that it is possible to measure the three-dimensional geometry of the injector nozzle, and to track changes in that geometry as the needle opens and closes in real time. This has enabled the dynamics of the injector to be compared with the dynamics of the spray, and allows computational fluid dynamics (CFD) simulations to use realistic time-dependent flow passage geometries. In this study, X-ray phase-enhanced imaging has been used to perform time-resolved imaging of the needle seat area in several common-rail diesel injection nozzles. The fuel distributions of the sprays emitted by these injectors were also studied with fast X-ray radiography. Correlations between eccentric motions of the injector needle valve and oscillations in the fuel density as it emerges from the nozzle are examined. CFD modeling is used to interpret the effect of needle motion on fuel flow.
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January 2011
Research Papers
The Effects of Diesel Injector Needle Motion on Spray Structure
C. F. Powell,
C. F. Powell
Center for Transportation Research,
Argonne National Laboratory
, Argonne, IL 60439
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A. L. Kastengren,
A. L. Kastengren
Center for Transportation Research,
Argonne National Laboratory
, Argonne, IL 60439
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Z. Liu,
Z. Liu
Advanced Photon Source,
Argonne National Laboratory
, Argonne, IL 60439
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K. Fezzaa
K. Fezzaa
Advanced Photon Source,
Argonne National Laboratory
, Argonne, IL 60439
Search for other works by this author on:
C. F. Powell
Center for Transportation Research,
Argonne National Laboratory
, Argonne, IL 60439
A. L. Kastengren
Center for Transportation Research,
Argonne National Laboratory
, Argonne, IL 60439
Z. Liu
Advanced Photon Source,
Argonne National Laboratory
, Argonne, IL 60439
K. Fezzaa
Advanced Photon Source,
Argonne National Laboratory
, Argonne, IL 60439J. Eng. Gas Turbines Power. Jan 2011, 133(1): 012802 (9 pages)
Published Online: September 24, 2010
Article history
Received:
September 25, 2009
Revised:
November 10, 2009
Online:
September 24, 2010
Published:
September 24, 2010
Citation
Powell, C. F., Kastengren, A. L., Liu, Z., and Fezzaa, K. (September 24, 2010). "The Effects of Diesel Injector Needle Motion on Spray Structure." ASME. J. Eng. Gas Turbines Power. January 2011; 133(1): 012802. https://doi.org/10.1115/1.4001073
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