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Experimental Investigation on the Characteristics and on the Reproducibility of the Flow issuing from a High-Pressure Direct-Injection Nozzle
Technical Paper
1999-01-3655
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
This paper presents an investigation on the experimental determination of some characteristics of the flow issuing from a swirl injector dedicated to direct-injection spark-ignited engines. The reproducibility, from one injection to another, of the temporal evolution of the liquid flow characteristics during the opening of the injector was investigated. This was achieved by using a high-speed film camera set at 8,000 images/s. The resulting visualizations allowed us to measure the evolution of the penetration length and velocity as well as of the liquid cone angle. It was found that the spray produced is a low momentum spray whose penetration length and velocity are small. The good reproducibility of the temporal evolution of the liquid flow characteristics has been obtained, except for the liquid cone angle during the opening stage. A fast-shutter video camera was also used to make images of the early development of the issuing liquid flow. These images were analyzed by a tomographic deconvolution technique that allowed us to get an information on the flow structure. It was found that this image analyzing procedure provided interesting quantitative results. For instance, as soon as 0.35 ms after the injection command, i.e., 0.05 ms after the very beginning of the liquid exit, the issuing liquid flow whose penetration length is equal to 5 mm, already shows an hollow structure 0.7 mm downstream the nozzle. Furthermore, the results obtained here indicate a rapid development of the flow inside the nozzle as well as outside (up to 3 mm) and the reduced influence of the opening stage.
Authors
Citation
Ledoyen, S., Dumouchel, C., and Preterre, C., "Experimental Investigation on the Characteristics and on the Reproducibility of the Flow issuing from a High-Pressure Direct-Injection Nozzle," SAE Technical Paper 1999-01-3655, 1999, https://doi.org/10.4271/1999-01-3655.Also In
References
- Zhao F.-Q. Lai M.-C. Harrington D.L. “A Review of Mixture Preparation and Combustion Control Strategies for Spark-ignited Direct-Injection Gasoline Engines” SAE Technical Paper n° 970627 1997
- Xu M. Markle L.E. “CFD-Aided Development of Spray for an Outwardly Opening Direct Injection Gasoline Injector” SAE Technical Paper n° 980493 1998
- Pontoppidan M. Gaviani G. Bella G. Rocco V. “Direct Fuel Injection - A Study of Injector Requirements for Different Mixture Preparation Concepts” SAE Technical Paper n° 970628 1997
- Ren W.M. Shen J. Nally J.F. Jr. “Geometrical Effects on Flow Characteristics of Gasoline High Pressure Direct Injector” SAE Technical Paper n° 971641 1997
- Dombrowski N. Hasson D. “The Flow Characteristics of Swirl (Centrifugal) Spray Pressure Nozzles with Low Viscosity Liquids” AIChE Journ. 15 604 611 1969
- Evers L.W. “Characterization of the Transient Spray from a High Pressure Swirl Injector” SAE Technical Paper n° 940188 1994
- Cousin J. Ren W.M. Nally J.F. Jr. “Transient Flows in High Pressure Swirl Injectors” SAE Technical Paper n° 980499 1998
- Yamauchi T. Wakisaka T. “Computation of the Hollow-Cone Sprays from a High-Pressure Swirl Injector for a Gasoline Direct-Injection SI Engine” SAE Technical Paper n° 962016 1996
- Parrish S.E. Farrell P.V. “Transient Spray Characteristics of a Direct-Injection Spark-Ignited Fuel Injector” SAE Technical Paper n° 970629 1997
- Le Coz J.F. “Comparison of Different Drop Sizing Techniques on Direct Injection Gasoline Sprays” Proceedings of the 9 th International Symp. On Applications of Laser Techniques to Fluid Mechanics 7.3.1. 1998
- Shelby M.H. VanDerWege B.A. Hochgred S. “Early Spray Development in Gasoline Direct-Injected Spark Ignition Engines” SAE Technical Paper n° 980160 1998
- Pitcher G. Winklhofer E. “Droplet Size and Velocity Measurements in the Spray of a Direct Injection Gasoline Injector” Proceedings of the ILASS-Europe'98 Manchester 352 1998
- Comer M.A. Bowen P.J. Sapsford S.M. Johns R.J.R. “The Transient Effects of Line Pressure for Pressure Swirl Gasoline Injectors” Proceedings of the ILASS-Europe'98 Manchester 364 1998
- Yule A.J. Seng C. AH Felton P.G. Unget A. Chigier N.A. “A Laser Tomographic Investigation of Liquid Fuel Spray” 18 th Symp. (Int.) on Combustion The Combustion Institute 1501 1510 1980
- Gomi H. “Pneumatic Atomisation with Coaxial Injectors: Measurements of Drop Sizes by the Diffraction Method and Liquid Phase Fraction by The Attenuation Method of Light” University of Sheffield December 1984
- Tatum J.B. Jaworski W.A. “A Solution of Abel's Equation” JQSRT 38 4 319 322 1987
- Preterre C. “Etude d'un arc transféré dans le méthane en atmosphère non oxydante et à pression normale” November 1991