Karuppasamy Pandian. M and Krishna Raj. K and Sabarinath. K and Sandeep. G and Sanal Kumar. V.R.
Influence of Port Geometry on Thrust Transient of Solid Propellant Rockets at Liftoff
2343 - 2348
2012
6
11
International Journal of Aerospace and Mechanical Engineering
https://publications.waset.org/pdf/13259
https://publications.waset.org/vol/71
World Academy of Science, Engineering and Technology
Numerical studies have been carried out using a two
dimensional code to examine the influence of pressure thrust
transient of solid propellant rockets at liftoff. This code solves
unsteady Reynoldsaveraged thinlayer Navier–Stokes equations by
an implicit LUfactorization timeintegration method. The results
from the parametric study indicate that when the port is narrow there
is a possibility of increase in pressure thrustrise rate due to
relatively high flame spread rate. Parametric studies further reveal
that flame spread rate can be altered by altering the propellant
properties, igniter jet characteristics and nozzle closure burst pressure
without altering the grain configuration andor the mission
demanding thrust transient. We observed that when the igniter
turbulent intensity is relatively low the vehicle could liftoff early due
to the early flow choking of the rocket nozzle. We concluded that the
high pressurizationrate has structural implications at liftoff in
addition to transient burning effect. Therefore prudent selection of the
port geometry and the igniter, for meeting the mission requirements,
within the given envelop are meaningful objectives for any designer
for the smooth liftoff of solid propellant rockets.
Open Science Index 71, 2012