Home

About

Advanced Search

Browse by Discipline

Scientific Societies

E-print Alerts

Add E-prints

E-print Network
FAQHELPSITE MAPCONTACT US


  Advanced Search  

 
TRAJECTORY AND AEROTHERMODYNAMIC ANALYSIS OF TOWED-BALLUTE AEROCAPTURE USING DIRECT
 

Summary: 1
AAS 07-307
TRAJECTORY AND AEROTHERMODYNAMIC ANALYSIS OF
TOWED-BALLUTE AEROCAPTURE USING DIRECT
SIMULATION MONTE CARLO
Kristin L. Gates Medlock,*
Alina A. Alexeenko,
and James M. Longuski
We investigate trajectories and aerothermodynamics of ballute-assisted,
low- to high-mass, Mars-entry systems. Ballutes permit aerocapture at
higher altitudes and allow for lower thermal protection system (TPS) mass,
due to lower heat fluxes, than traditional aeroshells. Because the velocity
change is achieved at high altitudes, rarefaction can be considerable. To
account for rarefaction we employ the Direct Simulation Monte Carlo
(DSMC) method, which is based on kinetic flow modeling. Trajectory
calculations are presented for Mars entry with varying vehicle masses (0.1
100 tons). In addition, detailed aerothermodynamic analysis is conducted
for the maximum heat flux conditions, for the 0.1 ton case. The DSMC
results indicate that the CD for Mars is higher than the CD calculated for air
at the same Knudsen number. Also, the DSMC analysis predicts a lower

  

Source: Alexeenko, Alina - School of Aeronautics and Astronautics, Purdue University

 

Collections: Engineering