TY - JOUR
T1 - Velocity and size of droplets in dense region of diesel fuel spray on transient needle opening condition
AU - Ueki, Hironobu
AU - Ishida, Masahiro
AU - Sakaguchi, Daisaku
N1 - Funding Information:
This research was fmancially supported by the Grants-in-Aid for Scientific Research from the Japan Society for the Promotion of Science. The authors also would like to thank Mr. Naganuma M, a graduate student of Nagasaki University for securing the experimental data.
PY - 2005/6
Y1 - 2005/6
N2 - In order to investigate the effect of transient needle opening on early stage of spray behavior, simultaneous measurements of velocity and size of droplet were conducted by a newly developed laser 2-focus velocimeter (L2F). The micro-scale probe of the L2F was consisted of two foci with a distance of 36 μm. The tested nozzle had a single hole with a diameter of 0.2 mm. The measurements of injection pressure, needle lift, and crank angle were synchronized with the spray measurement by the L2F at the position 10 mm downstream from the nozzle exit. It has been clearly shown that the velocity and size of droplet increase with needle valve opening and that the probability density distribution of droplet size can be fitted to the Nukiyama-Tanasawa distribution under the transient needle opening condition.
AB - In order to investigate the effect of transient needle opening on early stage of spray behavior, simultaneous measurements of velocity and size of droplet were conducted by a newly developed laser 2-focus velocimeter (L2F). The micro-scale probe of the L2F was consisted of two foci with a distance of 36 μm. The tested nozzle had a single hole with a diameter of 0.2 mm. The measurements of injection pressure, needle lift, and crank angle were synchronized with the spray measurement by the L2F at the position 10 mm downstream from the nozzle exit. It has been clearly shown that the velocity and size of droplet increase with needle valve opening and that the probability density distribution of droplet size can be fitted to the Nukiyama-Tanasawa distribution under the transient needle opening condition.
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U2 - 10.1007/s11630-005-0030-2
DO - 10.1007/s11630-005-0030-2
M3 - Article
AN - SCOPUS:23044460418
VL - 14
SP - 181
EP - 186
JO - Journal of Thermal Science
JF - Journal of Thermal Science
SN - 1003-2169
IS - 2
ER -