This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Photographic and Performance Studies of Diesel Combustion With a Rapid Compression Machine
Annotation ability available
Sector:
Language:
English
Abstract
Photographic and performance studies with a Rapid Compression Machine at the Massachusetts Institute of Technology have been used to develop insight into the role of mixing in diesel engine combustion. Combustion photographs and performance data were analyzed. The experiments simulate a single fuel spray in an open chamber diesel engine with direct injection. The effects of droplet formation and evaporation on mixing are examined. It is concluded that mixing is controlled by the rate of entrainment of air by the fuel spray rather than the dynamics of single droplets. Experimental data on the geometry of a jet in a quiescent combustion chamber were compared with a two-phase jet model; a jet model based on empirical turbulent entrainment coefficients was developed to predict the motion of a fuel jet in a combustion chamber with swirl. Good agreement between theory and experiment was obtained. The fuel and air mixing rate was estimated from the jet models and compared with combustion rates measured in the Rapid Compression Machine.
Authors
Topic
Citation
Rife, J. and Heywood, J., "Photographic and Performance Studies of Diesel Combustion With a Rapid Compression Machine," SAE Technical Paper 740948, 1974, https://doi.org/10.4271/740948.Also In
References
- Lyn W. T. “Study of Burning Rate and Nature of Combustion in Diesel Engines.” 9th Symposium of Combustion 1960
- Grigg H. C. Syed M. H. “The Problem of Predicting Rate of Heat Release in Diesel Engines.” Paper 13 Symposium on Diesel Engine Combustion Institution of Mechanical Engineers April 1970
- Henein N. A. “Combustion and Emission Formation in Fuel Sprays Injected in Swirling Air.” Paper 710220 SAE Automotive Engineering Congress Detroit January 1971
- Adler D. Lyn, W. T. “The Steady Evaporation and Mixing of a Spray in a Gaseous Swirl,” Int. J. Heat and Mass Transfer 14 1971
- Rogowski A. R. “A New Machine for Studying Combustion of Fuel Sprays with Controlled Air Motion.” SAE paper 436F 1961
- Jakuba S. “An Investigation of a Fluid Jet Theory Model of Diesel Fuel Spray Penetration Using the Rapid Compression Machine of M.I.T.” M.I.T. 1970
- Nayak P. R. “The Effects of Air Motion in Combustion in the M.I.T. Rapid Compression Machine.” M.I.T. 1965
- Alcock J. F. Scott W. M. “More Light on Diesel Combustion.” Proc. of the Automotive Division, No. 5 Institution of Mechanical Engineers 1962-63
- Scott W. M. “Looking in on Diesel Combustion.” SAE Transactions 78 1969 paper 69002 SP-345
- Pradtl L. “Essentials of Fluid Dynamics.” Hafner Publishing Co. 1949
- Sass F. Springer Verlag 1929
- Borman G. L. Johnson J. H. “Unsteady Vaporization Histories and Trajectories of Fuel Drops Injected into Swirling Air.” SAE paper 598C 1962
- El Wakil M. M. Myers P. S. Uyehara O. A. “Fuel Vaporization and Ignition Lag in Diesel Combustion.” SAE Transactions 64 1956
- Abramovich G. N. “The Theory of Turbulent Jets.” M.I.T. Press 1963
- Hoult D. P. Fay J. A. Forney L. J. “A Theory of Plume Rise Compared with Field Observations.” APCA Journal 19 8 1969
- Hoult D. P. Weil J. C. “Turbulent Plume in a Laminar Cross Flow.” “Atmospheric Environment.” 6 Pergamon Press 1972
- Lavoie G. A. Keck J. C. Heywood J. B. “Experimental and Theoretical Study of Nitric Oxide Formation in Internal Combustion Engines.” “Combustion Science and Technology.” 1 1970