This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Turbulent Air Flow in the Combustion Bowl of a D. I. Diesel Engine and Its Effect on Engine Performance
Annotation ability available
Sector:
Language:
English
Abstract
In developing high speed swirl supported direct injection diesel engines it has been a general experience that different engine results (performance, smoke and emission) may be obtained when using different intake port designs, although the swirl numbers (stationary flow test rig) of the different ports were identical. Therefore, an in-cylinder flow investigation under motoring conditions using hot wire anemometry was performed for three different inlet port designs having the same swirl number. Special emphasis was drawn on the engine design parameters being as close as possible to reality. Thus, the flow investigation and the engine tests were carried out at a typical compression ratio of 18 : 1 using a standard combustion bowl in the piston as well as produceable inlet ports. All flow measurements were carried out under motoring conditions covering the speed range from 1100 to 2400 rpm. By use of probes located on the piston a two-dimensional flow field including turbulence parameters could be established throughout the whole cycle. In parallel engine tests were carried out with the ports in question in order to obtain performance, smoke and gaseous emissions data with these ports. Hence, engine test data could be linked with in-cylinder flow data. As a result certain air motion characteristics within the bowl were found to be essential for the magnitude of smoke in the exhaust and for the efficiency of combustion (fuel economy).
Recommended Content
| Technical Paper | Air Motion and Its Effect on Diesel Performance and Emissions |
| Technical Paper | The Effect of Engine Speed on the TDC Flowfield in a Motored Reciprocating Engine |
Authors
Topic
Citation
Brandl, F., Reverencic, I., Cartellieri, W., and Dent, J., "Turbulent Air Flow in the Combustion Bowl of a D. I. Diesel Engine and Its Effect on Engine Performance," SAE Technical Paper 790040, 1979, https://doi.org/10.4271/790040.Also In
References
- Thien G. (“Development Work on Intake and Exhaust Ports of Four-stroke Diesel Engines”) 1965
- Pischinger F. (“Development Work on a Combustion System for Vehicle Diesel Engines”) 9th FISITA Congress London 1962
- Suzuki T. Ohta S. “Controlling Exhaust Emissions from the High Speed Diesel Engine with a Direct Injection Type Combustion Chamber” Conference on Combustion in Engines Cranfield, Inst. Mech. Engrs. 7-9 July 1975
- Suzuki T. Kobayashi A. Fujii T. “Controlling Exhaust Emission from the Turbocharged Automotiv Diesel Engine” 16th FISITA Congress Tokyo 1976
- Cartellieri W. P. Cichocki R. Thien G.E. Fachbach H.A. “The Swirl Supported Direct Injection Diesel Combustion System - Its Potential of Meeting Economical and Environmental Requirements” Conference on Land Transport Engines Inst. of Mech. Engrs. London 18-20 January 1977
- Alcock J. F. Scott W.M. “Some More Light on Diesel Combustion” SAE-paper 872 A 1964
- Huber E.W. Stock D. Pischinger F. (“Investigation of Mixture Formation and Combustion in a Diesel Engine by Means of Schlieren Method”) MTZ 32 9 1971
- Suzuki T. Shiozaki T. “A New Combustion System for the Diesel Engine and its Analysis via High Speed Photography” SAE-paper 770674 1977
- Ohigashi S. Hammamoto Y. Tanabe S. (“Measurement and Effect of Swirl on the Combustion in a Diesel Engine”) MTZ 33 4 1972
- Große W. (“Measurement of the Flow Field in a Diesel Engine with High Swirl”) MTZ 37 7 8 1976
- Durst F. Melling A. Whitelaw J.H. “Principles and Practice of Laser Doppler Anemometry” Academie Press London 1976
- Dyer T.M. Witze P.O. “Laser Velocity Measurements in a Constant Volume Internal Combustion Engine Simulator” Sandia Laboratories 1978
- Witze P.O. “Application of Laser Velocimetry to a Motored Internal Combustion Engine” Third International Workshop on Laser Velocimetry Purdue University July 11-13 1978
- Rusk R.B. “Velocity Measurements Inside the Cylinder of a Motored Internal Combustion Engine” Third International Workshop on Laser Velocimetry Purdue University July 11-13 1978
- Horvatin M. (“Development of a Hot-Wire Anemometer of High Response for Flow Measurements in Internal Combustion Engines”) 1971
- Weidenmüller M. (“Flow Velocity in the Combustion Chamber of a Motored Diesel Engine”) MTZ 31 4 1970
- Dent J.C. Derham J.A. “Air Motion in a Four-Stroke Direct Injection Diesel Engine” Proc.I.Mech.E. 188 1974
- Tindal M.J. Williams T.J. El Khafaji A.W. “Gas Flow Measurements in Engine Cylinders” SAE-paper 740719 1974
- Witze P.O. “Hot Wire Turbulence Measurements in a Motored Internal Combustion Engine” Sandia Laboratories Energy Report 1975
- Dent J.C. Salama N.S. “The Measurement of the Turbulence Characteristics in an Internal Combustion Engine Cylinder” SAE-paper 750886 1975
- Dent J.C. Derham J.A. “A Method for Checking the Consistency of Velocity Computation from Hot Wire Anemometer Measurements in Variable Density Flows” Jnl. of Physics E: Scientific Instruments 5 1972
- Hassan H. Dent J.C. “Correction for Temperature Loading and High Gas Pressure Effects for the Constant Temperature Hot Wire Anemometer” Br.J.Appl.Phys. (J.Phys.D.) 2 1969
- Morris C.J. Dent J.C. “The Simulation of Air-Fuel Mixing in High Swirl Open Chamber Diesel Engines” Proc.I.Mech.E. 1976 190 47 76
- Salama N.S. “A Study of Cyclic Variation in Gas Velocity and the Turbulence Structure in Spark Ignition Engines” Loughborough University of Technology 1974
- Hinze J.O. “Turbulence” McGraw-Hill London 1975
- Users Manual of AVL Digital Analyser Type 646.