Measurement of Diesel Spray Formation and Combustion upon Different Nozzle Geometry using Hybrid Imaging Technique
Document Type
Article
Publication Date
4-1-2014
Department
Department of Mechanical Engineering-Engineering Mechanics
Abstract
High pressure diesel sprays were visualized under vaporizing and combusting conditions in a constant-volume combustion vessel. Near-simultaneous visualization of vapor and liquid phase fuel distribution were acquired using a hybrid shadowgraph/Mie-scattering imaging setup. This imaging technique used two pulsed LED's operating in an alternative manner to provide proper light sources for both shadowgraph and Mie scattering. In addition, combustion cases under the same ambient conditions were visualized through high-speed combustion luminosity measurement. Two single-hole diesel injectors with same nozzle diameters (100μm) but different k-factors (k0 and k1.5) were tested in this study. Detailed analysis based on spray penetration rate curves, rate of injection measurements, combustion indicators and 1D model comparison have been performed. It is concluded that the nozzle geometry is causing the velocity and liquid flow area to vary at the nozzle outlet, which has an impact on air entrainment into the spray and results different combustion behavior.
Publication Title
SAE International Journal of Engines
Recommended Citation
Zhang, A.,
Montanaro, A.,
Allocca, L.,
Naber, J.,
&
Lee, S.
(2014).
Measurement of Diesel Spray Formation and Combustion upon Different Nozzle Geometry using Hybrid Imaging Technique.
SAE International Journal of Engines,
7(2), 1034-1043.
http://doi.org/10.4271/2014-01-1410
Retrieved from: https://digitalcommons.mtu.edu/michigantech-p/2968
Publisher's Statement
Copyright © 2014 SAE International. Publisher’s version of record: https://doi.org/10.4271/2014-01-1410