Effect of Nozzle Geometry on Macroscopic Behavior of Diesel Spray in the Near-Nozzle Field Tongji Univ

Format:

Conference/Event

Author/Creator:

Huang, Huang, author.

Contributor:

Deng, Jun

Gao, Ya

Gong, Huifeng

Hu, Zongjie

Li, Liguang

Wu, Zhijun

Conference Name:

SAE 2013 World Congress & Exhibition (2013-04-16 : Detroit, Michigan, United States)

Language:

English

Physical Description:

1 online resource

Place of Publication:

Warrendale, PA SAE International 2013

Summary:

In this study, the orifice inlet rounding radii of four dieselnozzles with different hydro erosive grinding time were measuredbased on the x-ray CT scan technology provided by ShanghaiSynchrotron Radiation Facility (SSRF), and a wide parametricalstudy of the spray macroscopic behavior in the first 18 mm from thenozzle tip have been carried out with high speed camera. And thenthe influence of orifice inlet rounding radius on the spraybehavior in the near-nozzle field was thoroughly investigated.The investigation results show that: the mean values of orificeinlet rounding radii of different nozzles are measured to be on theorder of 21.5-56.8 μm. Although the spray tip penetrations ofdifferent nozzles tend to increase with the hydro erosive grindingtime through statistical analyzing method, the variations ofpenetration from nozzles are less than 15% according to differenthydro erosive grinding timing. For the spray cone angle in thenear-nozzle field, the same maximum for nozzles of different hydroerosive grinding time can be achieved at the unsteady state, buthydro erosive grinding can shorten the unsteady duration of spraycone angle. During the steady state of spray, the difference inspray behavior from nozzles is distinctive and should adopt thestandard deviation of orifice inlet rounding radii to characterizeinstead of the mean value. A new correlation is proposed whichaccounts for the influence of the orifice inlet rounding radius onthe spray cone angle at the steady state

Notes:

Vendor supplied data

Publisher Number:

2013-01-1587

Access Restriction:

Restricted for use by site license