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Title: Spray flow structure from twin-hole diesel injector nozzles

Two techniques were used to study non-evaporating diesel sprays from common rail injectors which were equipped with twin-hole and single-hole nozzles for comparison. To characterise the sprays, high speed optical imaging and x-ray radiography were used. The former was performed at the LTRAC laboratory at Monash University, while the latter was performed at the 7-BM beamline of the Advanced Photon Source at Argonne National Laboratory. The optical imaging made use of high temporal, high spatial resolution spray recordings on a digital camera from which peripheral parameters in the initial injection phase were investigated based on edge detection. The x-ray radiography was used to explore quantitative mass distributions, which were measured on a point-wise basis at roughly similar sampling rate. Three twin-hole nozzles of different subtended angles and a single-hole nozzle were investigated at injection pressure of 1000 bar in environments of 20 bar back pressure. Evidence of strong cavitation was found for all nozzles examined with their C D ranging from 0.62 to 0.69. Penetration of the twin-hole nozzles was found to lag the single-hole nozzle, even before the sprays merged. Finally, switching in hole dominance was observed from one twin-hole nozzle, and this was accompanied by greater instability inmore » mass flow during the transient opening phase of the injector.« less
Authors:
ORCiD logo [1] ;  [2] ;  [3] ;  [2] ;  [2] ;  [2] ;  [1]
  1. Monash Univ., VIC (Australia). Lab. for Turbulence Research in Aerospace and Combustion, Dept. of Mechanical and Aerospace Engineering
  2. Argonne National Lab. (ANL), Argonne, IL (United States). Energy System Division
  3. Argonne National Lab. (ANL), Argonne, IL (United States). X-Ray Science Division
Publication Date:
Grant/Contract Number:
AC02-06CH11357
Type:
Accepted Manuscript
Journal Name:
Experimental Thermal and Fluid Science
Additional Journal Information:
Journal Volume: 86; Journal Issue: C; Journal ID: ISSN 0894-1777
Publisher:
Elsevier
Research Org:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org:
USDOE Office of Energy Efficiency and Renewable Energy (EERE), Vehicle Technologies Office (EE-3V); Australian Research Council (ARC)
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; 46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; Twin-hole nozzle; Diesel; Spray; Penetration; Spray merge; X-ray radiography
OSTI Identifier:
1377397
Alternate Identifier(s):
OSTI ID: 1416862