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Title: Determination of diesel spray axial velocity using x-ray radiography.

Abstract

Present knowledge of the velocity of the fuel in diesel sprays is quite limited due to the obscuring effects of fuel droplets, particularly in the high-density core of the spray. In recent years, x-ray radiography, which is capable of penetrating dense fuel sprays, has demonstrated the ability to probe the structure of the core of the spray, even in the dense near-nozzle region. In this paper, x-ray radiography data was used to determine the average axial velocity in diesel sprays as a function of position and time. Here, we report the method used to determine the axial velocity and its application to three common-rail diesel sprays at 250 bar injection pressure. The data show that the spray velocity does not reach its steady state value near the nozzle until approximately 200 {micro}s after the start of injection. Moreover, the spray axial velocity decreases as one moves away from the spray orifice, suggesting transfer of axial momentum to the surrounding ambient gas.

Authors:
; ; ; ; ; ; ; ;
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
EE
OSTI Identifier:
979545
Report Number(s):
ANL/ES/CP-58168
TRN: US201010%%761
DOE Contract Number:  
DE-AC02-06CH11357
Resource Type:
Conference
Resource Relation:
Conference: SAE 2007 World Congress; Apr. 16, 2007 - Apr. 19, 2007; Detroit, MI
Country of Publication:
United States
Language:
ENGLISH
Subject:
33 ADVANCED PROPULSION SYSTEMS; NOZZLES; PROBES; VELOCITY; X-RAY RADIOGRAPHY; DIESEL FUELS; SPRAYS

Citation Formats

Kastengren, A. L., Powell, C. F., Cheong, S-K, Wang, Y, Im, K-S, Liu, X, Wang, J, Riedel, T, and Robert Bosch GmbH. Determination of diesel spray axial velocity using x-ray radiography.. United States: N. p., 2007. Web.
Kastengren, A. L., Powell, C. F., Cheong, S-K, Wang, Y, Im, K-S, Liu, X, Wang, J, Riedel, T, & Robert Bosch GmbH. Determination of diesel spray axial velocity using x-ray radiography.. United States.
Kastengren, A. L., Powell, C. F., Cheong, S-K, Wang, Y, Im, K-S, Liu, X, Wang, J, Riedel, T, and Robert Bosch GmbH. Mon . "Determination of diesel spray axial velocity using x-ray radiography.". United States. doi:.
@article{osti_979545,
title = {Determination of diesel spray axial velocity using x-ray radiography.},
author = {Kastengren, A. L. and Powell, C. F. and Cheong, S-K and Wang, Y and Im, K-S and Liu, X and Wang, J and Riedel, T and Robert Bosch GmbH},
abstractNote = {Present knowledge of the velocity of the fuel in diesel sprays is quite limited due to the obscuring effects of fuel droplets, particularly in the high-density core of the spray. In recent years, x-ray radiography, which is capable of penetrating dense fuel sprays, has demonstrated the ability to probe the structure of the core of the spray, even in the dense near-nozzle region. In this paper, x-ray radiography data was used to determine the average axial velocity in diesel sprays as a function of position and time. Here, we report the method used to determine the axial velocity and its application to three common-rail diesel sprays at 250 bar injection pressure. The data show that the spray velocity does not reach its steady state value near the nozzle until approximately 200 {micro}s after the start of injection. Moreover, the spray axial velocity decreases as one moves away from the spray orifice, suggesting transfer of axial momentum to the surrounding ambient gas.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Mon Jan 01 00:00:00 EST 2007},
month = {Mon Jan 01 00:00:00 EST 2007}
}

Conference:
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