Pollutant formation and int ... combustion of heavy liquid fuels

CHAPTER VI. NUMERICAL MODELLING OF COMBUSTION IN THE DROP-TUBE FURNACE

1. Objectives of the numerical model

A literature survey of the experimental work carried out by other researchers shows that sulphur and nitrogen species interact to a significant extent. It is possible that the magnitude of such interaction can be predicted by a numerical model.

In an initial stage of the numerical simulation work performed in this thesis, the model was run to reproduce the experimental results from the combustion of fuels in air, with the main focus on NO_X formation and emission. The results provided verification of the model and its implementation. Subsequently, the effect of the addition of sulphur to the combustion system was investigated by including SO₂ in the system input. The accuracy of the results obtained from the combustion in air ensured that calculations with the addition of SO₂ to the combustion environment would help predict the behaviour of the real combustion system in the drop-tube furnace.

By performing the numerical calculations at a residence time equivalent to 500 mm distance from the atomiser nozzle, it was expected that the results would aid the prediction of experimental readings at that position.

Table of Contents

Pollutant formation and interaction in the combustion of heavy liquid fuels
Luis Javier Molero de Blas, PhD thesis, University of London, 1998
© Luis Javier Molero de Blas