Accession Number : ADA299514

Title :   High-Speed Four-Color Infrared Digital Imaging for Studying In-Cylinder Processes in a DI Diesel Engine.

Descriptive Note : Final rept.,

Corporate Author : RUTGERS - THE STATE UNIV PISCATAWAY NJ DEPT OF MECHANICAL AND AEROSPACE ENGIN EERING

Personal Author(s) : Rhee, K. T.

PDF Url : ADA299514

Report Date : 12 JUL 1995

Pagination or Media Count : 101

Abstract : The study was to investigate in-cylinder events of a direct injection-type diesel engine by using a new high-speed infrared (IR) digital imaging systems for obtaining information that was difficult to achieve by the conventional devices. For this, a new high-speed dual-spectra infrared digital imaging system was developed to simultaneously capture two geometrically identical (in respective spectral) sets of IR images having discrete digital information in a (64x64) matrix at rates as high as over 1,800 frames/sec each with exposure period as short as 20 micron sec. At the same time, a new advanced four-color W imaging system was constructed. The first two sets of spectral data were the radiation from water vapor emission bands to compute the distributions of temperature and specie in the gaseous mixture and the remaining two sets of data were to find the instantaneous temperature distribution over the cylinder surface. More than eight reviewed publications have been produced to report many new findings including: Distributions of Water Vapor and Temperature in a Flame; End Gas Images Prior to Onset of Knock; Effect of MTBE on Diesel Combustion; Impact of Oxygen Enrichment on In-cylinder Reactions; Spectral IR Images of Spray Plume; Residual Gas Distribution; Preflame Reactions in Diesel Combustion; Preflame Reactions in the End Gas of an SI Engine; Postflame Oxidation; and Liquid Fuel Layers during Combustion in an SI Engine. In addition, some computational analysis of diesel combustion was performed using KIVA-II program in order to compare results from the prediction and the measurements made using the new IR imaging diagnostic tool.

Descriptors :   *DIESEL ENGINES, *INFRARED IMAGES, DIGITAL SYSTEMS, TEMPERATURE, COMPUTATIONS, DISTRIBUTION, LAYERS, LIQUIDS, EMISSION SPECTRA, GASES, MIXTURES, SURFACES, OXYGEN, COMBUSTION, FUELS, SPECTRA, OXIDATION, CYLINDRICAL BODIES, RESIDUALS, IMAGES, DIAGNOSTIC EQUIPMENT, PLUMES, INFRARED RADIATION, DIESEL FUELS, SPRAYS, ENRICHMENT, WATER VAPOR, FUEL INJECTION.

Subject Categories : Infrared Detection and Detectors
      Reciprocating and Rotating Engines

Distribution Statement : APPROVED FOR PUBLIC RELEASE