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Title: Interplume Velocity and Extinction Imaging Measurements To Understand Spray Collapse When Varying Injection Duration Or Number Of Injections

Abstract

The collapse or merging of individual plumes of direct-injection gasoline injectors is of fundamental importance to engine performance because of its impact on fuel-air mixing. However, the mechanisms of spray collapse are not fully understood. The purpose of this work is to study the effects of injection duration and multiple injections on the interaction and/or collapse of multi-plume GDI sprays. High-speed (100 kHz) Particle Image Velocimetry (PIV) is applied along a plane between plumes to observe the full temporal evolution of plume-interaction and potential collapse, resolved for individual injection events. Supporting information along a line of sight is obtained using Diffused Back Illumination (DBI). Experiments are performed under simulated engine conditions using a symmetric 8-hole injector in a high-temperature, high-pressure vessel at the "Spray G" operating conditions of the Engine Combustion Network (ECN). Longer injection duration is found to promote plume collapse, while staging fuel delivery with multiple, shorter injections is resistant to plume collapse.

Authors:
 [1];  [2];  [2];  [2];  [3]
  1. Prince Mohammad Bin Fahd Univ., Al Khobar (Saudi Arabia)
  2. Sandia National Lab. (SNL-CA), Livermore, CA (United States)
  3. General Motors Global R&D, Warren, MI (United States)
Publication Date:
Research Org.:
Sandia National Lab. (SNL-CA), Livermore, CA (United States)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA)
OSTI Identifier:
1526912
Report Number(s):
SAND-2019-6452J
Journal ID: ISSN 1044-5110; 676140
Grant/Contract Number:  
AC04-94AL85000
Resource Type:
Accepted Manuscript
Journal Name:
Atomization and Sprays
Additional Journal Information:
Journal Volume: 28; Journal Issue: 9; Journal ID: ISSN 1044-5110
Publisher:
Begell House
Country of Publication:
United States
Language:
English
Subject:
PIV; DBI; spray; collapse; multiple injections; injection duration

Citation Formats

Sphicas, Panos, Pickett, Lyle M., Skeen, S. A., Frank, J. H., and Parrish, S. Interplume Velocity and Extinction Imaging Measurements To Understand Spray Collapse When Varying Injection Duration Or Number Of Injections. United States: N. p., 2018. Web. doi:10.1615/AtomizSpr.2018025956.
Sphicas, Panos, Pickett, Lyle M., Skeen, S. A., Frank, J. H., & Parrish, S. Interplume Velocity and Extinction Imaging Measurements To Understand Spray Collapse When Varying Injection Duration Or Number Of Injections. United States. doi:10.1615/AtomizSpr.2018025956.
Sphicas, Panos, Pickett, Lyle M., Skeen, S. A., Frank, J. H., and Parrish, S. Mon . "Interplume Velocity and Extinction Imaging Measurements To Understand Spray Collapse When Varying Injection Duration Or Number Of Injections". United States. doi:10.1615/AtomizSpr.2018025956. https://www.osti.gov/servlets/purl/1526912.
@article{osti_1526912,
title = {Interplume Velocity and Extinction Imaging Measurements To Understand Spray Collapse When Varying Injection Duration Or Number Of Injections},
author = {Sphicas, Panos and Pickett, Lyle M. and Skeen, S. A. and Frank, J. H. and Parrish, S.},
abstractNote = {The collapse or merging of individual plumes of direct-injection gasoline injectors is of fundamental importance to engine performance because of its impact on fuel-air mixing. However, the mechanisms of spray collapse are not fully understood. The purpose of this work is to study the effects of injection duration and multiple injections on the interaction and/or collapse of multi-plume GDI sprays. High-speed (100 kHz) Particle Image Velocimetry (PIV) is applied along a plane between plumes to observe the full temporal evolution of plume-interaction and potential collapse, resolved for individual injection events. Supporting information along a line of sight is obtained using Diffused Back Illumination (DBI). Experiments are performed under simulated engine conditions using a symmetric 8-hole injector in a high-temperature, high-pressure vessel at the "Spray G" operating conditions of the Engine Combustion Network (ECN). Longer injection duration is found to promote plume collapse, while staging fuel delivery with multiple, shorter injections is resistant to plume collapse.},
doi = {10.1615/AtomizSpr.2018025956},
journal = {Atomization and Sprays},
number = 9,
volume = 28,
place = {United States},
year = {2018},
month = {1}
}

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