Eccentric needle motion effect on near-nozzle dynamics of diesel spray

Huang, Weidi; Moon, Seoksu; Gao, Ya; Li, Zhilong; Wang, Jin

doi:10.1016/j.fuel.2017.06.012

Title: Eccentric needle motion effect on near-nozzle dynamics of diesel spray

Abstract

Here, the eccentric needle motion has been regarded as an important cause of in-nozzle flow disturbances and hole-to-hole spray variations of modern fuel injectors. However, the experimental investigations on this subject have rarely been reported due to great difficulties in the direct measurements of eccentric needle motion and the flow characteristics of individual holes in an injection nozzle. In this study, the axial and eccentric needle motion and the ear-nozzle spray dynamics of 3-hole, 5-hole and 8-hole diesel injection nozzles were investigated in varied injection pressure conditions using an xray phase-contrast imaging technique. The eccentric needle motion and near-nozzle spray axial velocity showed temporal oscillations during the injection with different oscillation frequencies. The frequencies of these two oscillations were independent to the nozzle and injection pressure. To discuss the mutual dependency of these two oscillations, the time traces of the spray axial velocity were measured for individual holes. The results showed that the oscillation phase, frequency and amplitude of the spray axial velocity were almost identical for all holes, which indicated that the sac pressure variation rather than hole-to-hole flow variation can be the primary cause of the spray axial velocity oscillation by the eccentric needle motion. The adequacy ofmore »« less

Authors:

Huang, Weidi ^[1]; Moon, Seoksu ^[1]; Gao, Ya ^[2]; Li, Zhilong ^[2]; Wang, Jin ^[2]

National Institute of Advanced Industrial Science and Technology, Ibaraki (Japan)
Argonne National Lab. (ANL), Argonne, IL (United States)

Publication Date:: Thu Jun 29 00:00:00 EDT 2017

Research Org.:: Argonne National Lab. (ANL), Argonne, IL (United States)

Sponsoring Org.:: Isuzu Motors Ltd.; USDOE

OSTI Identifier:: 1461350

Grant/Contract Number:: AC02-06CH11357

Resource Type:: Accepted Manuscript

Journal Name:: Fuel

Additional Journal Information:: Journal Volume: 206; Journal Issue: C; Journal ID: ISSN 0016-2361

Publisher:: Elsevier

Country of Publication:: United States

Language:: English

Subject:: 42 ENGINEERING; diesel injector; diesel spray; eccentric needle motion; spray axial velocity; X-ray phase-contrast imaging

Citation Formats


                    Huang, Weidi, Moon, Seoksu, Gao, Ya, Li, Zhilong, and Wang, Jin. Eccentric needle motion effect on near-nozzle dynamics of diesel spray.  United States: N. p., 2017. 
Web.  doi:10.1016/j.fuel.2017.06.012.

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                    Huang, Weidi, Moon, Seoksu, Gao, Ya, Li, Zhilong, & Wang, Jin. Eccentric needle motion effect on near-nozzle dynamics of diesel spray.  United States.  https://doi.org/10.1016/j.fuel.2017.06.012

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                    Huang, Weidi, Moon, Seoksu, Gao, Ya, Li, Zhilong, and Wang, Jin. Thu .  
"Eccentric needle motion effect on near-nozzle dynamics of diesel spray".  United States.  https://doi.org/10.1016/j.fuel.2017.06.012.  https://www.osti.gov/servlets/purl/1461350.

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@article{osti_1461350,

  title        = {Eccentric needle motion effect on near-nozzle dynamics of diesel spray},

  author       = {Huang, Weidi and Moon, Seoksu and Gao, Ya and Li, Zhilong and Wang, Jin},

  abstractNote = {Here, the eccentric needle motion has been regarded as an important cause of in-nozzle flow disturbances and hole-to-hole spray variations of modern fuel injectors. However, the experimental investigations on this subject have rarely been reported due to great difficulties in the direct measurements of eccentric needle motion and the flow characteristics of individual holes in an injection nozzle. In this study, the axial and eccentric needle motion and the ear-nozzle spray dynamics of 3-hole, 5-hole and 8-hole diesel injection nozzles were investigated in varied injection pressure conditions using an xray phase-contrast imaging technique. The eccentric needle motion and near-nozzle spray axial velocity showed temporal oscillations during the injection with different oscillation frequencies. The frequencies of these two oscillations were independent to the nozzle and injection pressure. To discuss the mutual dependency of these two oscillations, the time traces of the spray axial velocity were measured for individual holes. The results showed that the oscillation phase, frequency and amplitude of the spray axial velocity were almost identical for all holes, which indicated that the sac pressure variation rather than hole-to-hole flow variation can be the primary cause of the spray axial velocity oscillation by the eccentric needle motion. The adequacy of this consideration was thoroughly discussed using a mass balance model in the nozzle sac that predicted the sac pressure variation during an injection event.},

  doi          = {10.1016/j.fuel.2017.06.012},

  journal      = {Fuel},

  number       = C,

  volume       = 206,

  place        = {United States},

  year         = {Thu Jun 29 00:00:00 EDT 2017},

  month        = {Thu Jun 29 00:00:00 EDT 2017}

}

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https://doi.org/10.1016/j.fuel.2017.06.012

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Works referenced in this record:

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Energy Conversion and Management, Vol. 103
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Effect of the number and position of nozzle holes on in- and near-nozzle dynamic characteristics of diesel injection
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Fuel, Vol. 150
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Near-nozzle dynamics of diesel spray under varied needle lifts and its prediction using analytical model
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Fuel, Vol. 180
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Needle lift profile influence on the vapor phase penetration for a prototype diesel direct acting piezoelectric injector
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Moon, Seoksu; Tsujimura, Taku; Gao, Yuan
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Works referencing / citing this record:

Nozzle tip wetting in gasoline direct injection injector and its link with nozzle internal flow
journal, August 2019

Huang, Weidi; Moon, Seoksu; Wang, Jin
International Journal of Engine Research, Vol. 21, Issue 2
DOI: 10.1177/1468087419869774

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Similar Records

Title: Eccentric needle motion effect on near-nozzle dynamics of diesel spray

Abstract

Citation Formats

Imaging in the optically dense regions of a spray: A review of developing techniques journal, October 2013

Ultra-high speed imaging study of the diesel spray close to the injector tip at the initial opening stage with single injection journal, March 2016

Effect of nozzle orifice geometry on spray, combustion, and emission characteristics under diesel engine conditions journal, March 2011

Influence of injector technology on injection and combustion development – Part 1: Hydraulic characterization journal, April 2011

Comparison of microsac and VCO diesel injector nozzles in terms of internal nozzle flow characteristics journal, October 2015

Effect of the number and position of nozzle holes on in- and near-nozzle dynamic characteristics of diesel injection journal, June 2015

Near-field dynamics of high-speed diesel sprays: Effects of orifice inlet geometry and injection pressure journal, October 2014

Unraveling the Geometry Dependence of In-Nozzle Cavitation in High-Pressure Injectors journal, June 2013

A Linear optical sensor for measuring needle displacement in common-rail diesel injectors journal, March 2007

A New Optical Sensor for the Measurement of the Displacement of the Needle in a Common Rail Injector conference, September 2013

Near-nozzle dynamics of diesel spray under varied needle lifts and its prediction using analytical model journal, September 2016

Needle lift profile influence on the vapor phase penetration for a prototype diesel direct acting piezoelectric injector journal, November 2013

Study of the influence of the needle lift on the internal flow and cavitation phenomenon in diesel injector nozzles by CFD using RANS methods journal, February 2013

Numerical study of the effects of injector needle movement and the nozzle inclination angle on the internal fluid flow and spray structure of a group-hole nozzle layout journal, December 2015

Numerical Modelling of the In-Nozzle Flow of a Diesel Injector with Moving Needle during and after the End of a Full Injection Event journal, January 2015

Cavitation in Real-Size Multi-Hole Diesel Injector Nozzles conference, March 2000

Influence of the Spatially Resolved Nozzle Hole Exit Flow Distribution on Diesel Spray Development conference, September 2007

High-Speed X-Ray Imaging of Diesel Injector Needle Motion conference, August 2009

Biodiesel effects on transient needle motion and near-exit flow characteristics of a high-pressure diesel injector journal, September 2013

Linking instantaneous rate of injection to X-ray needle lift measurements for a direct-acting piezoelectric injector journal, March 2016

An Eulerian CFD model and X-ray radiography for coupled nozzle flow and spray in internal combustion engines journal, April 2015

Effect of Off-Axis Needle Motion on Internal Nozzle and Near Exit Flow in a Multi-Hole Diesel Injector journal, April 2014

Ultrafast X-ray study of dense-liquid-jet flow dynamics using structure-tracking velocimetry journal, January 2008

Morphological Exploration of Emerging jet Flows from Multi-Hole Diesel Injectors at Different Needle Lifts journal, January 2015

The effect of temperature and pressure on thermodynamic properties of diesel and biodiesel fuels journal, March 2011

Nozzle tip wetting in gasoline direct injection injector and its link with nozzle internal flow journal, August 2019

Imaging in the optically dense regions of a spray: A review of developing techniques
journal, October 2013

Ultra-high speed imaging study of the diesel spray close to the injector tip at the initial opening stage with single injection
journal, March 2016

Effect of nozzle orifice geometry on spray, combustion, and emission characteristics under diesel engine conditions
journal, March 2011

Influence of injector technology on injection and combustion development – Part 1: Hydraulic characterization
journal, April 2011

Comparison of microsac and VCO diesel injector nozzles in terms of internal nozzle flow characteristics
journal, October 2015

Effect of the number and position of nozzle holes on in- and near-nozzle dynamic characteristics of diesel injection
journal, June 2015

Near-field dynamics of high-speed diesel sprays: Effects of orifice inlet geometry and injection pressure
journal, October 2014

Unraveling the Geometry Dependence of In-Nozzle Cavitation in High-Pressure Injectors
journal, June 2013

A Linear optical sensor for measuring needle displacement in common-rail diesel injectors
journal, March 2007

A New Optical Sensor for the Measurement of the Displacement of the Needle in a Common Rail Injector
conference, September 2013

Near-nozzle dynamics of diesel spray under varied needle lifts and its prediction using analytical model
journal, September 2016

Needle lift profile influence on the vapor phase penetration for a prototype diesel direct acting piezoelectric injector
journal, November 2013

Study of the influence of the needle lift on the internal flow and cavitation phenomenon in diesel injector nozzles by CFD using RANS methods
journal, February 2013

Numerical study of the effects of injector needle movement and the nozzle inclination angle on the internal fluid flow and spray structure of a group-hole nozzle layout
journal, December 2015

Numerical Modelling of the In-Nozzle Flow of a Diesel Injector with Moving Needle during and after the End of a Full Injection Event
journal, January 2015

Cavitation in Real-Size Multi-Hole Diesel Injector Nozzles
conference, March 2000

Influence of the Spatially Resolved Nozzle Hole Exit Flow Distribution on Diesel Spray Development
conference, September 2007

High-Speed X-Ray Imaging of Diesel Injector Needle Motion
conference, August 2009

Biodiesel effects on transient needle motion and near-exit flow characteristics of a high-pressure diesel injector
journal, September 2013

Linking instantaneous rate of injection to X-ray needle lift measurements for a direct-acting piezoelectric injector
journal, March 2016

An Eulerian CFD model and X-ray radiography for coupled nozzle flow and spray in internal combustion engines
journal, April 2015

Effect of Off-Axis Needle Motion on Internal Nozzle and Near Exit Flow in a Multi-Hole Diesel Injector
journal, April 2014

Ultrafast X-ray study of dense-liquid-jet flow dynamics using structure-tracking velocimetry
journal, January 2008

Morphological Exploration of Emerging jet Flows from Multi-Hole Diesel Injectors at Different Needle Lifts
journal, January 2015

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