A 3D numerical simulation in ANSYS Fluent, describing the combustion
of Jet A in a SR-30 Turbojet Engine is made at a full-load
case. This is done to investigate the formation of primary particles,
which are mainly soot. The project is delimited to only focus on
the formation in the combustion chamber of the turbine. A reduced
reaction mechanism consisting of 38 reactions and 24 species, describing
the combustion of Jet A as a surrogate fuel is used. This is
chosen as it resembles the combustion characteristics of Jet A, and
because soot precursors are present as species in the mechanism.
From an initial literature study, the presense of soot precursors is
said to predict the formation of soot under favorable conditions.
A non-premixed combustion simulation is made in ANSYS Fluent,
with the reduced reaction mechanism and the surrogate fuel incorporated.
The boundary conditions of the model is based on results
from experiments done on the SR-30 Turbojet Engine. From the results
of this CFD simulation a soot formation pathway is analysed
and predicted. This is compared with the soot formation model
available in ANSYS Fluent. Despite it was not possible to obtain a
fully evolved soot model, it indicates that the predicted soot formation
is correct. In order to predict all pathways of the soot formation
a more detailed reaction mechanism is needed.