thrust e80 static motor test spring 2009. forces on a rocket
TRANSCRIPT
Forces on a Rocket
http://www.grc.nasa.gov/WWW/K-12/rocket/rktth1.htmlhttp://www.grc.nasa.gov/WWW/K-12/rocket/rktth1.html
The Question
• In the event of a crash landing of your rocket, what will be the effect on the instruments inside the rocket?
(Translation)
• What is the velocity of impact?
• What is the impulse response of the rocket structure?
Thrust Analysis
KINETICS(Non equilibrium processes)
Fuel Burn Rate
m
THERMODYNAMICS(Equilibrium processes)
Exit conditions from nozzle
ePeV
Kinetics of Solid Fuel Combustion
4 4 2 3 3 2 2( ) ( ) ( ) ( ) ( ) ( )6 10 4 2 3 12s s s g g gNH ClO Al Al O AlCl N H O
burnsfuel VAm
ntburn kPV
!!!!!!ENERGY
Isentropic Flow through Nozzles
21dA A
MadV V
0dA
dV
0dA
dV
0dA
dV
For subsonic flow (Ma<1)
For supersonic flow (Ma>1)
For sonic flow (Ma=1)