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Abstract

Sixteen commercial residual fuel oils have been chemically analyzed, using proton and carbon-13 nuclear magnetic resonance, gas chromatography with mass spectrometry detection, and thermogravimetric analysis. The fuels have been classified according to their aromaticity, aliphatic chain length, number of chain branches, sulphur content, paraffin evaporation sequence, and weight loss diagram with increasing temperature, both under air and under nitrogen. Fourteen model fuels (alkanes, alkenes, aromatics, substituted aromatics, saturated ring, and binary mixtures) have been injected into high pressure, high temperature nitrogen, in simulations of diesel injection in the absence of combustion, tested at nine points on the pressure/temperature diagram, and characterized according to plume penetration and spread, droplet forming and vaporization tendencies. In general, mixed fuels vaporize according to a rapid mixing "distillation" model. The results obtained so far are not in good accord with any existing theory of fuel injection. Combustion work has commenced using a small high pressure cell. Ignition delays of a number of model fuels have been studied as a function of temperature and pressure using a pressure transducer and by light emission. A large facility for simulating in-cylinder combustion of residual fuel oils in medium-to-large bore diesel engines has been redesigned, rebuilt, and is undergoing a second commissioning trial.

Additional information

Authors: DALE B W, AERE, HARWELL LABORATORIES, DIDCOT (UK);NEGUS C R, AERE, HARWELL LABORATORIES, DIDCOT (UK);STENHOUSE I A, AERE, HARWELL LABORATORIES, DIDCOT (UK);MCNIVEN A J AERE, HARWELL LABORATORIES, DIDCOT (UK), AERE, HARWELL LABORATORIES, DIDCOT (UK)
Bibliographic Reference: EUR 10726 EN (1986) MF, 38 P., BFR 150, BLOW-UP COPY BFR 200, EUROFFICE, LUXEMBOURG, POB 1003
Availability: Can be ordered online
Record Number: 1989125052000 / Last updated on: 1987-11-01
Category: PUBLICATION
Available languages: en
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