R. Ogabi, B. Manescau, K. Chetehouna and S. Senave
DOI Number XXX-YYY-ZZZ
Conference Number HiSST-2022-297
In the field of aeronautics, there are several catastrophes related to fire, one of the most devastating
is the fire in full flight. Indeed, aircraft accidents leading to fires are often fatal and cause a lot of losses
both human and material. Moreover, in the context of reducing manufacturing costs and the use of
aircraft, they are still subject to optimization in energy performance. For this, the composite materials
used in their design are the subject of research and development. Composite materials have good
mechanical properties but have drawbacks when subjected to fire. In this scope, before being used in
aircraft design, composite materials are subjected to certification tests for fire resistance based on the
standard ISO 2685. These tests are carried out using the FAA standard NexGen burner. In addition, so
that the fire test meets the criteria of the standard ISO 2685, the flame must have a temperature of
1100 °C ±80 °C and a heat flux of 116 kW / m2 ±10 kW / m2
. In this context, the air / kerosene mixture
must be made in the right proportions with good conditions of temperature and pressure. In this study,
the equivalence ratio is calculated from the mixture between air and kerosene. The objective of this work
is to highlight experimentally and numerically the effect of the equivalence ratio on the dynamics of the
air / kerosene flame used for the standard tests. The numerical calculations have been carried out using
the CFD, FDS code and experiments carried out with the NexGen burner. A validation study showed a
good agreement between numerical and experimental results and highlights the capability of FDS to
simulate the reactive flows of an air / kerosene diffusion flame. Subsequently, from the numerical and
experimental results, it is shown that the flame meets the criteria of ISO 2685 for an equivalence ratio
about 0.79.