Numerical Modelling Of Gas-solid Interface For
Homogeneous Propellant Combustion
Author(s)
A. Peratta
Abstract
This paper reports on the implementation and results obtained with a timedependent
Arbitrary Lagrangian–EulerianFinite Volume calculation for modelling
the fluid–solid interface in laminar burning of solid energetic materials. The
formulation is based on the conservation equations of mass, momentum and
energy troughout the moving interface. Degradation-pirolysis and combustion are
taken into account in the solid and gase phase, respectively. The chemical model
is implemented with 7 unidirectional global reactions and 12 reactive species.
The outcomes of the model are pressure, temperature, density, heat release,
species concentration, gas speed and bulk burning rate. The numerical model
is able to describe the main characteristics of the flame structure, including the
induction (dark) zone. Burning rates and species concentration profiles are in good
agreement with experimental measurements and previously published literature.
The method can be used to study a variety of time-dependent processes including
transient ignition, extinction, and combustion instabilities.
1 Introduction
Solid energetic materials are mostly used for rocket propulsion systems in either
space or defence industry. Other applications include pyrotechnic actuators,
boosters, manoeuvring and safety devices, as well as air-bags for automobile
safety [1] and gas generators. Among the large family of solid energetic materials
are the \“smokeless” homogeneous propellants, developed several decades ago,
which are still in use in many of the above mentioned applications. The
homogeneous propellant, also known as Double-Base propellant (DBP) carries
both oxidising and reducing chemical agents in the same molecular structure,
usually composed of a homogeneous mixture of Nitroglycerine (NG) and
Keywords
Related Book
Other papers in this volume
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