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Computer Analysis of Fuel-Air Mixing in Direct-Injection Engines
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English
Abstract
The extension is described of an existing multidimensional method of calculating in-cylinder air motion to the representation of the injection of a liquid fuel spray. Sample calculations are presented of the droplet and gas motion and fuel-air mixing in an axisymmetric representation of an open-chamber direct-injection engine, in the absence of combustion, and are believed to be the first in which a realistic representation of the gas-phase turbulence behaviour is employed. One of the more important findings is that the spray induces velocities and turbulence levels in the gas which are comparible to, and sometimes greater than, those produced by other mechanisms such as swirl and squish. It is concluded however that considerable further work is required to make such models truly predictive and detailed experimental data is urgently required to assist this task.
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Authors
Citation
Gosman, A. and Johns, R., "Computer Analysis of Fuel-Air Mixing in Direct-Injection Engines," SAE Technical Paper 800091, 1980, https://doi.org/10.4271/800091.Also In
References
- Gosman, A.D. Johns, R.J.R. “Development of a predictive tool for in-cylinder gas motion in engines” SAE 780315 1978
- Gosman, A.D. Johns R.J.R. Watkins, A.P. “Assessment of a prediction method for in-cylinder process in reciprocating engines” Proc. General Motors Research Symposium on Combustion Modelling in Reciprocating Engines 1978
- Gosman A.D. Johns R.J.R. Tipler W. Watkins A.P. “Computer simulation of in-cylinder flow, heat transfer and combustion: a progress report.” Proc. 13th ClMAC Conference Vienna 1979
- Hay N. Jones, P.L. “Comparison of the various correlations for spray penetration.” SAE 720776 1972
- Shahed S.M. Chiu W.S. Lyn W.T. “A mathematical model of diesel combustion.” Conference on “Combustion in Engines,” Inst. Mech. Engrs 1975
- Haselman L.C. Westbrook, C.K. “A theoretical model for two-phase fuel injection in stratified charge engines.” SAE 780318 1978
- Ingebo, R.D. “Drag coefficients for droplets and solid spheres in clouds accelerating in airstreams.” 1956
- El Wakil M.M. Uyehara O.A. Myers P.S. “A theoretical investigation of the heating-up period of injected fuel droplets vaporising in air.” 1954
- Borman G.L. Johnson, J.H. “Unsteady vaporisation histories and trajectories of fuel drops injected into swirling air.” SAE 598C 1962
- Savery W. Borman, G.L. “Experiments on droplet vaporisation at supercritical pressures.” AIAA paper No. 70-6 1970
- Kamimoto T. Matsuoka, S. “Prediction of spray evaporation in reciprocating engines.” SAE 770413 1977
- Crowe, C.T. “A computational model for the gas droplet flow field in the vicinity of an atomizer.” Western States Section, The Comb. Inst. Paper No. 74-25 1974
- El Banhawy Y. “The calculation of the flow properties of a confined kerosine-spray flame” 1978
- Butler, T.D. Cloutman, L.D. Dukowicz, J.K. Ramshaw J.D. Kreiger, R.B. “Towards a comprehensive model for combustion in a direct injection stratified charge engine.” Proc. General Motors Symp. on Combustion Modelling in Reciprocating Engines 1978
- Hirt, C.W. Amsden A.A. Cook, J.L. “An arbitrary Lagrangian Eulerian computing method for all flow speeds.” J. Comp. Phys. 14 227 1974
- Adler D. Lyn, W.T. “The steady evaporation and mixing of a spray in a gaseous swirl.” Int. J. Heat and Mass Transfer 14 793 1971
- Bracco, F.V. Gupta, H.L. Krishnamurthy, L. Santavicca, D.A. Steinberger R.L. Warsaw, V. “Two-phase, two-dimensional, unsteady combustion in internal combustion engines; theoretical-experimental results.” SAE 760114 1976
- Gosman A.D. Johns R.J.R. “The generation of curvilinear-orthogonal grids for the solution of problems in fluid mechanics.”
- Hinze J.O. “Turbulence.” McGraw-Hill New York 1959
- Jones W.P. Launder, B.E. “The calculation of low Reynolds number phenomena with a two-equation model of turbulence.” Int. J. Heat and Mass Transfer 16 1189 1973
- Gosman, A.D. Lockwood F.C. Salooja, A.P. “The prediction of cylindrical furnaces gaseous fueled with premixed and diffusion burners.” 17th Symp. (Int) on Comb. 1979
- Ingebo, R.D. “Heat transfer and drag coefficients for ethanol drops in a rocket chamber burning enthonol and liquid oxygen.” 8th Sym. (Int) on Comb. 1960
- Ranz W.E. Marshall, W.R. “Evaporation from drops.” Chem. Eng. Prog 48 141 146 173 180 1952
- Bose A.K. Pei, C.T. “Evaporation rates in spray drying.” Can. J. Chem. Eng. 42 252 1964
- Hiroyasu, T. Kadota Arai, M. “Fuel spray characterisation in diesel engines -informative data for the computation of diesel engine combustion.” Proc. General Motors Symp. on Combustion Modelling in Reciprocating Engines 1978
- Meurer, S. “Weiterentwicklung von Gemischbildung und Verbrennung auf der Basis des M-verfahrens.” MTZ 33 8 307 1972
- Wilkes M.V. “Numerical analysis.” Cambridge Univ. Press 1971
- Reynolds, W.C. “Modelling of fluid motion in engines; an introductory overview.” Proc. General Motors Symp. on Combustion Modelling in Reciprocating Engines 1978
- Reitz R.D. “Atomization and other breakup regimes of a liquid jet.” Princeton Univ. 1978
- Gosman A.D. Lockwood F.C. Megahed I.E.A Shah N.G. “The prediction of the flow, reaction and heat transfer in the combustion chamber of a glass furnace.” Jan. 1980 AIAA meeting, Pasadena