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Air Velocity Measurements in Engines by Vortex Shedding
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English
Abstract
This paper describes a new application of Karman vortex shedding frequency as a velocity sensor in a motored internal combustion engine cylinder. The probe design, experimental setup and data reduction procedures are described. The quality of data obtained depends strongly on the relative frequency distribution of the free-stream turbulence and of the vortex shedding induced by the vortex generator. The instrument was evaluated on a CFR engine equipped with a shrouded intake valve. The results are presented in terms of the airswirl ratio at several selected crank angle degrees versus engine speed. The limitations of the device were also demonstrated in L-head engine tests.
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Chen, L., Myers, P., and Uyehara, O., "Air Velocity Measurements in Engines by Vortex Shedding," SAE Technical Paper 741057, 1974, https://doi.org/10.4271/741057.Also In
References
- Obert Edward F. “Internal Combustion Engines.” International Textbook Co. 1968
- Huffaker Robert M. Fuller Charles E. Lawrence T. R. “Application of Laser Doppler Velocity Instrumentation to the Measurement of Jet Turbulence.” SAE Transactions 78 1969 paper 690266
- Durstand F. Whitelaw J. H. “Light Source and Geometrical Requirements for the Optimization of Optical Anemometry Signals.” Opto-electronics 5 2 1973 137 151
- Lading L. “Analysis of Signal-to-Noise Ratio of the Laser Doppler Velocimeter.” Opto-electronics 5 2 1973 175 187
- Vasilenko Yu G. “The Development of an Optical Doppler Technique for Measuring Flow Velocities.” Optoelectronics 5 2 1973 153 161
- Bossel H. H. Hiller W. J. Meier G. A. E. “NoiseCancelling Signal Difference Method for Optical Velocity Measurements.” Journal of Physics E: Scientific Instruments 5 1972 893 896
- Bossel H. H. Hiller W. J. Meier G. A. E. “Self-Aligning Comparison Beam Methods for One-, Two-, and Three-Dimensional Optical Velocity Measurements.” Journal of Physics E: Scientific Instruments 1972 897 900
- Ohigashi S. Hamamoto Y. Tanabe S. “A New Digital Method for Measuring Gas Flow Velocity by Electric Discharge.” Paper 690180 SAE International Automotive Engineering Congress and Exposition Detroit January 1969
- Ohigashi S. Hamamoto Y. Tanabe S. “Swirl-Its Measurement and Effect on Combustion in a Diesel Engine.” Automobile Div. and Combustion Engine Group Conference 1971
- El-Khafaji A. H. A. Tindal M. J. Williams T. J. “Engine Cylinder Gas Flow Measurements by Hot-Wire Anemometers.” Symposium on Flow-Its Measurement and Control in Science and Industry Paper No. 2-3-47 Pittsburgh Instrument Society of America 1971
- Wienke H. J. Myers P. S. Uyehara O. A. “A Resistance Thermometer for Engine Compression Temperatures.” SAE International Summer Meeting Montreal June 1963
- Perry A. E. Morrison G. L. “Static and Dynamic Calibration of Constant Temperature Hot-Wire Systems.” JFM 47 1971 756 777
- Morrison G. L. Perry A. E. Samuel A. E. “Dynamic Calibration of Inclined and Crossed Hot-Wires.” JFM 52 1972 465 474
- Sememov E. S. “Studies of Turbulent Gas Flow in Piston Engines.” Combustion in Turbulent Flow Khitrin L. N. 1959 1963
- Horvatin M. Hussmann A. W. “Measurement of Air Movements in Internal Combustion Engine Cylinders.” DISA Information 8 July 1969
- Hassan H. Dent J. C. “The Measurement of Air Velocity in a Motored Internal Combustion Engine Using a Hot-Wire Anemometer.” Combustion Engines Group, Proc. Inst. Mech. Engrs. 185 50 1971
- Jagadeesan T. R. “An Experimental Investigation of Air Motion Inside the Cylinder of a Diesel Engine.” Indian Institute of Technology Madras, India 1974
- Roshko A. “On the Development of Turbulent Wakes From Vortex Streets.” NACA, Report 1191 1955
- Bailey S. J. “Two New Flow-Meters Have No Moving Parts.” Control Engineering 1969 73 75
- Campbell R. J. “New Vortex Flow-Meter Uses Ultrasonics.” Control Engineering July 1973
- Magrab E. B. “The Measurement of the Time Varying Phenomenon.” New York Wiley Interscience 1971
- Federal Scientific Corporation “Manual of Ubiquitous Spectrum Analyzer.” Model UA-64
- Surry D. “Some Effects of Intense Turbulence on Aerodynamics of a Circular Cylinder at Subcritical Reynolds Number.” Journal of Fluid Mechanics 52 1972 543 563
- Achenbach E. “Influence of Surface Roughness on Cross Flow Around a Circular Cylinder.” Journal of Fluid Mechanics 46 321 335
- Mair W. A. Maull D. J. “Bluff Bodies and Vortex Shedding-A Report on Euromech 17.” Journal of Fluid Mechanics 45 1971 209 224
- Mair W. A. Maull D. J. “Aerodynamic Behavior of Bodies in the Wakes of Other Bodies.” Phil. Trans. Roy. Soc. London A269 1971 425 437
- Sykes D. M. “The Supersonic and Low-Speed Flows Past Circular Cylinders of Finite Length Supported at One End.” Journal of Fluid Mechanics 12 1961
- Bearman P. W. “On Vortex Street Wakes.” Journal of Fluid Mechanics 28 1967 625 641
- DISA Instruction Manual of DISA 55M System with 55 MlO CTA Standard Bridge
- DISA Instruction Manual of DISA 55A01 Constant Temperature Hot Wire Anemometer
- Sangamo Operating Instructions for Model 1784
- Applied Dynamics 256 Analog Computer User's Manual
- Chai A. A. “SDS 930 Digital Computer User's Manual.” Hybrid Computer Lab., Univ. of Wisconsin 1972
- LeFeuvre T. Myers P. S. Uyehara O. A. Shipinski J. S. “A Tape Recording and Computer Processing System For Instantaneous Engine Data.” SAE Transactions 77 1968 paper 680133