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Gas Flow Measurements in Engine Cylinders
ISSN: 0148-7191, e-ISSN: 2688-3627
Published February 01, 1974 by SAE International in United States
Annotation ability available
Interest in the measurement of gas flow in both spark ignition and compression ignition engine cylinders has increased since it has become evident that both swirl and turbulence can have an important influence on combustion and hence exhaust emissions. Among the methods available for indicating such flows, the hot wire anemometer would seem on balance to be the most suitable. Since the hot wire probe is sensitive to both mass flow rate and temperature of the gas, a circuit was devised which compensated automatically for variations in the latter. Measurements of gas velocity and turbulence were obtained during the induction and compression strokes of a motored 4-stroke engine in which the level of swirl could be varied by means of masked inlet valves. The validity of steady flow methods of assessing the swirl level associated with a given cylinder head geometry is discussed.
CitationTindal, M., Williams, T., and El Khafaji, A., "Gas Flow Measurements in Engine Cylinders," SAE Technical Paper 740719, 1974, https://doi.org/10.4271/740719.
- Wenger H., “Messung der Stromungsgeschwindigkeit im Zylinder eines fremdangetriebenen BMW.” VI Flugmotors Luftfahrtforschung, Band 16, No. 2, 1939.
- Semenov E. S., “Studies of Turbulent Gas Flow in Piston Engines.” NASA Tech. Transl. F-97, 1963.
- Horvatin M. and Hussmann A. W., “Messung von Luftbewegungen im Zylinder von Verbrennungomotoren.” XII FISITA Congress, Barcelona, 1968. (Summarized in DISA Information No. 8, 1969).
- Weidenmuller M., “Geschwindigkeiten im Brennraum eines fremdangetriebenen Dieselmotors.” MTZ, No. 4, April 1970.
- Hassan H. and Dent J. C., “The Measurement of Air Velocity in a Motored Internal Combustion Engine Using a Hot-Wire Anemometer.” Proc. 1. Mech.E., Vol. 185, 1970-1971.
- Huebner K. H. and McDonald A. T., “Experimental Determination of Airflow Patterns in Piston Engines with Induction Swirl.” Paper 720026 presented at SAE Automotive Engineering Congress, Detroit, January 1973.
- Ohigashi S., Hamamoto Y., and Tanabe S., “Swirl-Its Measurement and Effect on Combustion in a Diesel Engine.” 1. Mech.E. Conference on Air Pollution Control in Transport Engines, Solihull, 1971.
- Arnold M. J., Tindal M. J., and Williams T. J., “Measurement of Induction Gas Velocities in a Reciprocating Engine Cylinder.” SAE Transactions, Vol. 81 (1972), paper 720115.
- El-Khafaji A. H. A., Tindal M. J., and Williams T. J., “Engine Cylinder Gas Flow Measurements by Hot-Wire Anemometers.” Symposium on Flow-its Measurements and Control in Science and Industry, Pittsburgh, 1971.
- El-Khafaji A. H. A., University of London Ph.D. thesis, 1972.
- Fitzgeorge D. and Allison J. L., “Air Swirl in a Road Vehicle Diesel Engine.” Proc. 1. Mech.E. (A.D.) No. 4, 1962-1963.
- Watts R. and Scott W. M., “Air Motion and Fuel Distribution Requirements in High-Speed Direct-Injection Diesel Engines.” Symposium on Diesel Engine Combustion, I.Mech.E. paper 17, p. 167, 1970.