Accession Number : ADA296017

Title :   Spectral IR Images of Direct-Injection Diesel Combustion by High-Pressure Fuel Injection,

Corporate Author : RUTGERS - THE STATE UNIV NEW BRUNSWICK NJ COLL OF ENGINEERING

Personal Author(s) : Clasen, E. ; Campbell, S. ; Rhee, K. T.

Report Date : 02 MAR 1995

Pagination or Media Count : 14

Abstract : Instantaneous successive spectral infrared (IR) images were obtained from a spray plume in a direct injection (DI) type compression-ignition (Cl) engine during the compression and combustion periods. The engine eqwpped with a high pressure electronic-controlled fuel injector system was operated by using D-2 Diesel fuel. In the new imaging system used for the present study, four high-speed IR cameras (with respective band filters in front) were lined up to a single optical arrangement containing three spectral beam splitters to obtain four spectral images at once. Two band filters were used for imaging the water vapor distribution and another two band filters were placed for capturing images of combustion chamber wall or soot formation. The simultaneous imaging was successively triggered by signals from an encoder connected to the engine. The fuel injection parameters were precisely controlled and the pressure-time (p-t) history was obtained for individual sets of images. The start of fuel injection was varied through four different crank angle positions. Mentioning some results from the study, the spectral IR images had no resemblance with the ones obtained using a visible-range camera from a comparable engine system as reported by others. In general, the present spectral images taken at the same crank angle were not mutually comparable.

Descriptors :   *SPECTRA, *INFRARED SPECTRA, *FUEL INJECTION, ANGLES, INJECTION, SOOT, PARAMETERS, HIGH PRESSURE, BEAM SPLITTING, COMBUSTION, IMAGES, CAMERAS, ENGINES, SYNCHRONISM, PLUMES, INFRARED RADIATION, SPRAYS, WATER DISTRIBUTION, WATER VAPOR, IMAGE PROJECTORS, CRANKSHAFTS.

Subject Categories : Atomic and Molecular Physics and Spectroscopy
      Reciprocating and Rotating Engines

Distribution Statement : APPROVED FOR PUBLIC RELEASE