Environmental Engineering Reference
In-Depth Information
Solid-Fuel Rocket Motor Efficiency
Improvement Scheme
Ryoichi S. Amano, Yi-Hsin Yen and Michael L. Hamman
Abstract Aluminum-based propellants are commonly used in solid rocket motors
(SRM) due to their high energy densities. However, the alumina (Al
2
O
3
) particles
produced during aluminum propellant combustion present performance issues.
These particles
flow along the combustion chamber to the nozzle in liquid form
causing chemical and mechanical erosive damage. This erosive behavior should be
avoided in an SRM because it decreases the ballistic performance. Since particle
size and trajectory are believed to in
fl
uence the impingement and accumulation of
alumina droplets, which then affects erosive behavior, it is necessary to accurately
predict both the particle size and trajectory. For design purposes, accurate predic-
tion must allow for numerical simulation of particle size and trajectory for
economic purposes. Recent work in particle size and trajectory using real time
radiography (RTR) and numerical simulation demonstrated predictive capabilities
for low solid-to-gas. Another study presented image processing methods to effec-
tively process RTR images for larger particle sizes. Since the cost of experimental
testing in is very high, due to high temperature and pressure, research in SRM field
is more focused on numerical simulation. However, before simulation result could
be used in SRM research CFD model validation is necessary. To provide validation
for CFD modelling, a water-air two phase strait channel
fl
low with controlled low
temperature and pressure is used. In this chapter, two major parts will be covered,
which include the comparison between water-air strait channel experiment and CFD
results, and a quanti
fl
cation method for both experimental and CFD results is
presented.
Keywords Ceramic
bers
Polymer-derived ceramics
Hazardous waste
remediation
Advanced ceramic-based sensor systems
SiC
bers
SiCN
bers
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