Accession Number:

ADA300035

Title:

High-Speed Four-Color Infrared Digital Imaging for Study In-Cylinder Processes in a DI Diesel Engine,

Descriptive Note:

Corporate Author:

RUTGERS - THE STATE UNIV PISCATAWAY NJ COLL OF ENGINEERING

Personal Author(s):

Report Date:

1995-07-12

Pagination or Media Count:

101.0

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 framessec each with exposure period as short as 20 usec. At the same time, a new advanced four-color IR 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.

Subject Categories:

  • Optics
  • Reciprocating and Rotating Engines

Distribution Statement:

APPROVED FOR PUBLIC RELEASE