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

Journal Article · · Atomization and Sprays
 [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)
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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.

Research Organization:
Sandia National Lab. (SNL-CA), Livermore, CA (United States)
Sponsoring Organization:
USDOE National Nuclear Security Administration (NNSA)
Grant/Contract Number:
AC04-94AL85000
OSTI ID:
1526912
Report Number(s):
SAND-2019-6452J; 676140
Journal Information:
Atomization and Sprays, Vol. 28, Issue 9; ISSN 1044-5110
Publisher:
Begell HouseCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 4 works
Citation information provided by
Web of Science

Cited By (1)

Development of limited-view tomography for measurement of Spray G plume direction and liquid volume fraction journal January 2020

Figures / Tables (15)

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Related Subjects

42 ENGINEERING
PIV
DBI
spray
collapse
multiple injections
injection duration