This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Visualization and Analysis of Spray Impingement Under Cross-Flow Conditions
Technical Paper
2002-01-2664
ISSN: 0148-7191, e-ISSN: 2688-3627
Annotation ability available
Sector:
Language:
English
Abstract
Gasoline Direct Injection (GDI) engines are becoming increasingly popular due to the potential to improve power and fuel consumption. The direct injection of gasoline inside an engine is classified in three types: wall-guided; air-guided; and spray-guided (also designated as air-assisted). In the wall-guided, spray impingement on the piston's bowl head is part of the process to form a stratified charge near the spark plug, as well as to aid in the fuel mixture preparation. In the air-guided (swirl and tumble) and spray-guided, the impingement is undesirable.
The interaction between the spray and the surrounding air, as well as the characteristics of the spray, are very important to achieve the benefits of the GDI concept. Although many works have been published which consider the structure of individual sprays, much remains to be known about the interaction between the spray and the wall in the presence of air motion. This is the goal of our work. For that an experimental facility has been built to study the fluid and thermodynamic behavior of a gasoline spray impinging onto a cold/heated surface under cross flow conditions. In a first step of our study we intend to build a fundamental basis on the influence of droplet size and velocity relatively to the cross flow and, therefore, used a PFI injector for easy of experimental analysis. Despite this injector operates at low pressure, images of the spray under quiescent conditions showed a spray quality similar to that of a DI injector, without injection of streams of liquid. Also, measurements obtained with a phase Doppler anemometer showed that droplet sizes range between 10μm and 120μm.
The present paper reports the results obtained with Mie scattering and shadowgraph using a high speed CCD camera to analyze the influence of the pressure and duration of injection in the spray/wall interaction, considering the presence of different cross flow velocities.
Recommended Content
Authors
Topic
Citation
Panão, M. and Moreira, A., "Visualization and Analysis of Spray Impingement Under Cross-Flow Conditions," SAE Technical Paper 2002-01-2664, 2002, https://doi.org/10.4271/2002-01-2664.Also In
References
- Meingast, U. Staudt, M. Reichelt, L. Renz, U. Sommerhoff, F.-A. “Analysis of Spray/Wall Interaction Under Diesel Engine Conditions” SAE Paper 2000-01-0272 2000
- Arcoumanis, C. Chang, J.-C. “Heat transfer between a heated plate and an impinging transient diesel spray” Experiments in Fluids 16 105 119 1993
- Özdemir, I. B. Whitelaw, J. H. “Impingement of an unsteady two-phase jet on unheated and heated flat plates” J. Fluid Mech. 252 499 523 1993
- Park, J. Xie, X. Im, K.S. Kim, H. Lai M.-C. Yang, J. Han Z. Anderson, R.W. “Characteristics of Direct Injection Gasoline Spray Wall Impingement at Elevated Temperature Conditions” SAE Paper 1999-01-3662 1999
- Kawajiri, K. Yonezawa, T. Ohuchi, H. Sumida, M. Katashiba, H. “Study of Interaction Between Spray and Air Motion, and Spray Wall Impingement” SAE Paper 2002-01-0836 2002
- Brehem, C. Whitelaw, J.H. Sassi, L. Vafidis, C. “Air and Fuel Characteristics in the Intake Port of a SI Engine” SAE Paper 1999-01-1491 1999
- Bai, C. Gosman, A.D. “Development of Methodology for Spray Impingement Simulation” SAE Paper 950283 1995
- Lee, S.H. Ryou, H.S. “Development of a new spray/wall interaction model” International J. Multiphase Flow 26 1209 1234 2000
- Lindgren, R. Denbratt, I. “Modellingg Gasoline Spray-Wall Interaction - A Review of Current Models” SAE Paper 2000-01-2808 2000
- Mundo, C. Tropea, C. Sommerfeld, M. “Numerical and Experimental Investigation of Spray Characteristics in the Vicinity of a Rigid Wall” Experimental Thermal and Fluid Science 15 228 237 1997
- Mundo, C. Sommerfeld, M. Tropea, C. “On the modelling of liquid sprays impinging on surfaces” Atomization and Sprays 8 625 652 1998
- Rusche, H. “CFD Simulation of Spray Impingement Processes” 1997
- Tropea, C. Roisman, I.V. “Modelling of Spray Impact on Solid Surfaces” Atomization and Sprays 10 387 408 2000
- Arcoumanis, C. Cutter, P. “Flow and Heat Transfer Characteristics of Impinging Diesel Sprays Under Cross-Flow Conditions” SAE Paper 950448 1995
- Arcoumanis, C. Whitelaw, D.S. Whitelaw, J.H. “Gasoline Injection Against Surfaces and Films” Atomization and Sprays 7 437 456 1997
- Li, J. Huang, Y. Alger, T.F. Matthews, R.D. Hall, M.J. Stanglmaier, R.H. Roberts, C.E. Dai, W. Anderson, R.W. “Liquid Fuel Impingement on In-Cylinder Surfaces as a Source of Hydrocarbon Emissions From Direct Injection Gasoline Engines” Journal of Engineering for Gas Turbines and Power 123 659 667 2001
- Landsberg, G.B. Heywood, J.B. Cheng, W.K. “Contribution of Liquid Fuel to Hydrocarbon Emissions in Spark Ignition Engines” SAE Paper 2001-01-3587 2001
- Hochgreb, S. “Liquid Fuel Impingement on the Piston Bowl of a Direct-Injection, Spark-Ignited (DISI) Engine Under Stratified Operation” SAE Paper 2001-01-3646 2001
- Senda, J. Ohnishi, M. Takahashi, T. Fujimoto, H. Utsunomiya, A. Wakatabe, M. “Measurement and Modeling on Wall Wetted Fuel Film Profile and Mixture Preparation in Intake Port of SI Engine” SAE Paper 1999-01-0798 1999
- Bai, C.X. “Modelling of spray impingement processes” University of London
- Tong, K. Quay, B.D. Zello, J.V. Santavicca, D.A. “Fuel Volatility Effects on Mixture Preparation and Performance in a GDI Engine During Cold Start” SAE Paper 2001-01-3650 2001