  Ingestion of sand particles into gas turbine engines has been observed to
cause damage to engine components and in some cases leads to catastrophic
failure. One such mechanism responsible for engine failure occurs through the
deposition of molten particles on the turbine blades in the hot-section of the
engine. The deposited material reacts chemically and penetrates the thermal
barrier coating (TBC) on the turbines blades eventually damaging them. In this
work, we investigate the deposition of sand particles on a solid substrate
using two-way coupled Euler-Lagrange simulations. In these simulations, hot gas
at 1700 K is issued from a circular inlet at Mach 0.3. Simultaneously,
spherical mono-dispersed sand particles, modeled after the
Calcia-Magnesia-Alumino-Silicates(CMAS), are injected at a constant mass flow
rate of 1 gram per minute. The deposition of these particles on a solid
substrate, placed 20 cm away from the inlet along the axial direction, is
investigated. Simulations are carried out for three different synthetic sand
particles CMAS, AFRL 02 and AFRL 03. The effect of Stokes number on particle
properties such as number of particle depositions, rebound velocity and
coefficient of restitution are investigated.
