This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Simultaneous Measurement of the Flame Lift-Off Length on Direct Injection Diesel Sprays Using High Speed Schlieren Imaging and OH Chemiluminescence
Technical Paper
2017-01-2307
ISSN: 0148-7191, e-ISSN: 2688-3627
This content contains downloadable datasets
Annotation ability available
Sector:
Language:
English
Abstract
Lift-off length is defined as the distance from injector hole to the location where flame stabilized on a high injection pressure direct injection (DI) diesel spray. In this paper we used the high-speed (40 kHz) Schlieren and time-averaged OH chemiluminescence imaging technique to simultaneously measure the flame lift-off locations on a DI diesel spray in an optically accessible and constant-volume combustion vessel. The time-resolved development of the diesel spray acquired from the high-speed Schlieren imaging system enabled us to observe the instantaneous spray structure details of the spray flames. The OH chemiluminescence image obtained from a gated, intensified CCD video camera with different delay and width settings was used to determine the quiescent lift-off length. Experiments were conducted under various ambient temperatures, ambient gas densities, injection pressures and oxygen concentrations. From the Schlieren images of the injecting procedure, along the axis of the spray from the injector hole, a distinct expansion located in the downstream, after which the edge of the spray changed to transparent gradually and the refractive index gradients started to diminish. This point was defined as the flame location of high-speed Schlieren and the length from it to the injector was employed as the lift-off length. It is found that the Schlieren imaging lift-off length fluctuated within a certain range during the injection process, and the average lift-off length of quiescent conditions was also measured based on the OH chemiluminescence image. The results of the high-speed Schlieren imaging coincided well with the lift-off length results acquired from the CCD results, indicating high-speed Schlieren imaging technique can be used to measure the flame lift-off length on DI diesel spray.
Authors
Topic
Citation
Wei, Y., Li, T., Wang, B., and Shi, W., "Simultaneous Measurement of the Flame Lift-Off Length on Direct Injection Diesel Sprays Using High Speed Schlieren Imaging and OH Chemiluminescence," SAE Technical Paper 2017-01-2307, 2017, https://doi.org/10.4271/2017-01-2307.Data Sets - Support Documents
Title | Description | Download |
---|---|---|
Unnamed Dataset 1 | ||
Unnamed Dataset 2 |
Also In
References
- Dec J. E. Conceptual Model of DI Diesel Combustion Based On Laser-Sheet Imaging Simulation & Modeling 1997
- Flynn , P. , Durrett , R. , Hunter , G. , zur Loye , A. et al. Diesel Combustion: An Integrated View Combining Laser Diagnostics, Chemical Kinetics, And Empirical Validation SAE Technical Paper 1999-01-0509 1999 10.4271/1999-01-0509
- Higgins , B. and Siebers , D. Measurement of the Flame Lift-Off Location on DI Diesel Sprays Using OH Chemiluminescence SAE Technical Paper 2001-01-0918 2001 10.4271/2001-01-0918
- Siebers , D. and Higgins , B. Flame Lift-Off on Direct-Injection Diesel Sprays Under Quiescent Conditions SAE Technical Paper 2001-01-0530 2001 10.4271/2001-01-0530
- Knox B. W. and Genzale C. L. Scaling combustion recession after end of injection in diesel sprays Combustion & Flame 8 2 679 695 2015
- Rothrock A. M. and Waldron C. D. Effect of nozzle design on fuel spray and flame formation in a high-speed compression-ignition engine Technical Report Archive 1937
- Shundoh S. , Kakegawa T. , Tsujimura K. , and Kobayashi S. The Effect of Injection Parameters and Swirl on Diesel Combustion with High Pressure Fuel Injection Vehicle Engine 1991
- Chomiak J. and Karlsson A. Flame liftoff in diesel sprays Symposium on Combustion 26 2 2557 2564 1996
- Winklhofer , E. , Fuchs , H. , and Philipp , H. Diesel Spray Combustion - An Optical Imaging Analysis SAE Technical Paper 930862 1993 10.4271/930862
- Larsson , A. Optical Studies in a DI Diesel Engine SAE Technical Paper 1999-01-3650 1999 10.4271/1999-01-3650
- Pickett , L. and Siebers , D. Non-Sooting, Low Flame Temperature Mixing-Controlled DI Diesel Combustion SAE Technical Paper 2004-01-1399 2004 10.4271/2004-01-1399
- Musculus , M. , Lachaux , T. , Pickett , L. , and Idicheria , C. End-of-Injection Over-Mixing and Unburned Hydrocarbon Emissions in Low-Temperature-Combustion Diesel Engines SAE Technical Paper 2007-01-0907 2007 10.4271/2007-01-0907
- Skeen S. A. , Manin J. , and Pickett L. M. Simultaneous formaldehyde PLIF and high-speed schlieren imaging for ignition visualization in high-pressure spray flames Proceedings of the Combustion Institute 35 3 3167 3174 2013
- Benajes J. , Payri R. , Bardi M. , and MartĂ-AldaravĂ P. Experimental characterization of diesel ignition and lift-off length using a single-hole ECN injector Applied Thermal Engineering 58 1-2 554 563 2013
- Lillo , P. , Pickett , L. , Persson , H. , Andersson , O. et al. Diesel Spray Ignition Detection and Spatial/Temporal Correction SAE Int. J. Engines 5 3 1330 1346 2012 10.4271/2012-01-1239
- Pastor , J. , Payri , R. , Garcia-Oliver , J. , and Nerva , J. Schlieren Measurements of the ECN-Spray A Penetration under Inert and Reacting Conditions SAE Technical Paper 2012-01-0456 2012 10.4271/2012-01-0456
- Shi , Q. , Li , T. , Zhang , X. , Wang , B. et al. Measurement of Temperature and Soot (KL) Distributions in Spray Flames of Diesel-Butanol Blends by Two-Color Method Using High-Speed RGB Video Camera SAE Technical Paper 2016-01-2190 2016 10.4271/2016-01-2190
- Li T. , Zhang X. Q. , Wang B. , Guo T. , Shi Q. , and Zheng M. Characteristics of non-evaporating, evaporating and burning sprays of hydrous ethanol diesel emulsified fuels Fuel 191 251 265 2017
- Naber J. D. and Siebers D. L. Effects of Gas Density and Vaporization on Penetration and Dispersion of Diesel Sprays Sae Technical Papers 105 3 82 111 1996