Mixture Turbulence - A Key to Cyclic Combustion Variation Dept. of Mechanical Engineering, University of Michigan

Format:

Conference/Event

Author/Creator:

Winsor, Richard E., author.

Conference Name:

1973 International Automotive Engineering Congress and Exposition (1973-01-08 : Detroit, Michigan, United States)

Language:

English

Physical Description:

1 online resource

Place of Publication:

Warrendale, PA SAE International 1973

Summary:

Cyclic combustion variations were studied in a single-cylinder CFR engine with a pancake combustion chamber. Variations in the combustion duration were shown to be related to mixture velocity and its variations through a simple model. This model postulates a critical flame radius increment in which mixture motion variations near the spark electrodes create the cyclic combustion variations. From experimental measurements, the critical flame radius increment in this engine was found to be about 0.4 inchesThe mixture motion measurements were made with a hot-wire anemometer in the engine motored without fuel. A new calibration and calculation technique was developed in order to obtain velocities from the anemometer output in the varying temperature and pressure environment of the engine. Tests were run at full and part load over the speed range of 500-1500 rpm. It was found that near tdc the turbulence in the engine was isotropic and the turbulent velocity increased linearly with engine speed

Notes:

Vendor supplied data

Publisher Number:

730086

Access Restriction:

Restricted for use by site license