This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Evaluation of Diesel Spray with Non-Circular Nozzle - Part I: Inert Spray
Technical Paper
2019-01-0065
ISSN: 0148-7191, e-ISSN: 2688-3627
This content contains downloadable datasets
Annotation ability available
Sector:
Language:
English
Abstract
Numerous studies have characterized the impact of high injection pressure and small nozzle holes on spray quality and the subsequent impact on combustion. Higher injection pressure or smaller nozzle diameter usually reduce soot emissions owing to better atomization quality and fuel-air mixing enhancement. The influence of nozzle geometry on spray and combustion of diesel continues to be a topic of great research interest. An alternate approach impacting spray quality is investigated in this paper, specifically the impact of non-circular nozzles. The concept was explored experimentally in an optically accessible constant-volume combustion chamber (CVCC). Non-reacting spray evaluations were conducted at various ambient densities (14.8, 22.8, 30 kg/m3) under inert gas of Nitrogen (N2) while injection pressure was kept at 100 MPa. Shadowgraph imaging was used to obtain macroscopic spray characteristics such as spray structure, spray penetration, and the spray cone angle. Analysis from image processing showed expected result of lower penetration rate and higher spray cone angle as ambient density increased. Two slot nozzles with different aspect ratios but similar flow area as compared with one of the circular nozzles were tested. Given a certain minor-to-major axis ratio of the non-circular nozzle, spray penetration of non-circular nozzle can be longer or shorter than that of the circular nozzle. At a similar condition, the spray cone angle was smaller for the non-circular nozzle compared to that of the circular nozzle. A mathematical model based on the work of Hiroyasu & Arai [1] was applied to predict spray tip penetration for all the tested nozzles. The model was then modified to predict spray penetration of non-circular nozzles. Non-circular nozzles were shown to have an impact on spray break-up and spray penetration, that can potentially promote the level of mixing. Validated 3D CFD simulation was used to provide insight into the spray and combustion of a non-circular nozzle. Subsequently, longer ignition delay was observed for non-circular nozzle as compared to a circular nozzle through simulation results.
Recommended Content
Authors
Citation
Cung, K., Moiz, A., Shah, B., Kalaskar, V. et al., "Evaluation of Diesel Spray with Non-Circular Nozzle - Part I: Inert Spray," SAE Technical Paper 2019-01-0065, 2019, https://doi.org/10.4271/2019-01-0065.Data Sets - Support Documents
| Title | Description | Download |
|---|---|---|
| Unnamed Dataset 1 | ||
| Unnamed Dataset 2 | ||
| Unnamed Dataset 3 | ||
| Unnamed Dataset 4 | ||
| Unnamed Dataset 5 |
Also In
References
- Hiroyasu , H. and Arai , M. Structures of Fuel Sprays in Diesel Engines SAE Technical Paper 900475 1990 10.4271/900475
- Glassman , I. , Yetter , R.A. , and Glumac , N.G. Combustion Academic Press 2014
- Pickett , L.M. and Siebers , D.L. Orifice Diameter Effects on Diesel Fuel Jet Flame Structure Journal of Engineering for Gas Turbines and Power 127 1 187 196 2005
- Cung , K. et al. Effect of Micro-Hole Nozzle on Diesel Spray and Combustion SAE Technical Paper 2018-01-0301 2018 10.4271/2018-01-0301
- Polonowski , C.J. , Mueller , C. , Gehrke , C. , Bazyn , T. et al. An Experimental Investigation of Low-Soot and Soot-Free Combustion Strategies in a Heavy-Duty, Single-Cylinder, Direct-Injection, Optical Diesel Engine SAE Int. J. Fuels Lubr. 5 1 51 77 2011 10.4271/2011-01-1812
- Gehmlich , R.K. et al. Using Ducted Fuel Injection to Attenuate or Prevent Soot Formation in Mixing-Controlled Combustion Strategies for Engine Applications Applied Energy 226 1169 1186 2018
- Matsson , A. and Andersson , S. The Effect of Non-Circular Nozzle Holes on Combustion and Emission Formation in a Heavy Duty Diesel Engine SAE Technical Paper 2002-01-2671 2002 10.4271/2002-01-2671
- Matsson , A. , Jacobsson , L. , and Andersson , S. The Effect of Elliptical Nozzle Holes on Combustion and Emission Formation in a Heavy Duty Diesel Engine SAE Technical Paper 2000-01-1251 2000 10.4271/2000-01-1251
- Sharma , P. and Fang , T. Spray and Atomization of a Common Rail Fuel Injector with Non-Circular Orifices Fuel 153 416 430 2015
- Sharma , P. and Fang , T. Breakup of Liquid Jets from Non-Circular Orifices Experiments in Fluids 55 2 1666 2014
- Yu , S. et al. Experimental Study on the Spray Characteristics Discharging from Elliptical Diesel Nozzle at Typical Diesel Engine Conditions Fuel 221 28 34 2018
- Yu , S. et al. Experimental Study on the Diesel and Biodiesel Spray Characteristics Emerging from Equilateral Triangular Orifice under Real Diesel Engine Operation Conditions Fuel 224 357 365 2018
- Ho , C.-M. and Ephraim , G. Vortex Induction and Mass Entrainment in a Small-Aspect-Ratio Elliptic Jet Journal of Fluid Mechanics 179 383 405 1987
- Jacobsson , L. and Chomiak , J. Injection Orifice Shape: Effects on Combustion and Emission Formation in Diesel Engines SAE Technical Paper 972964 1997 10.4271/972964
- Jacobsson , L. , Winklhofer , E. , and Chomiak , J. Injection Orifice Shape: Effects on Spray Characteristics and Heat-Release Rate in a Large-Size Single-Cylinder Diesel Engine SAE Technical Paper 1999-01-3490 1999 10.4271/1999-01-3490
- Wang , F. and Fang , T. Liquid Jet Breakup for Non-Circular Orifices under Low Pressures International Journal of Multiphase Flow 72 248 262 2015
- Schadow , K.C. et al. Enhancement of Mixing in Reacting Fuel-Rich Plumes Issued from Elliptical Nozzles Journal of Propulsion and Power 3 2 145 149 1987
- Shields , B. , Neroorkar , K. , and Schmidt , D. Cavitation as Rapid Flash Boiling 23rd Annual Conference on Liquid Atomization and Spray Systems (ILASS-Americas) Ventura, CA May. 2011
- http://www.sandia.gov/ECN/
- Golovichev , V. http://www.tfd.chalmers.se/~valeri/MECH.html
- Siebers , D.L. Scaling Liquid-Phase Fuel Penetration in Diesel Sprays Based on Mixing-Limited Vaporization SAE Technical Paper 1999-01-0528 1999 10.4271/1999-01-0528
- Cung , K. et al. Ignition and Formaldehyde Formation in Dimethyl Ether (DME) Reacting Spray under Various EGR Levels Proceedings of the Combustion Institute 36 3 3605 3612 2017