An important problem for space vehicles is contamination of the spacecraft surface by combustion products and unburned fuel exhausting from control thruster nozzles. The objective of the present work is a detailed simulation of the backflow in the case of gas exhaustion from the nozzle into vacuum. A specific feature of this problem is the drastic expansion of the initially dense flow at the nozzle exit, which makes necessary simulations of the near-continuum flow inside the nozzle, the transitional flow near the nozzle exit, and the free-molecular flow outside the nozzle. The simulations are performed by a combined Navier-Stokes/DSMC approach.
DSMC and Navier-Stokes Study of Backflow for Nozzle Plumes Expanding into Vacuum
2005
7 pages
Report
No indication
English
Manufacturing Technology , Fluid Mechanics , Combustion & Ignition , Unmanned Spacecraft , Spacecraft , Nozzles , Navier stokes equations , Plumes , Thrust control , Backflow , Simulation , Molecules , Vacuum , Transitions , Combustion products , Fatigue(Physiology) , Exits , Contamination , Flow , Russia , Gases , Fuels , High density , Foreign reports
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