DSMC and Navier-Stokes Study of Backflow for Nozzle Plumes Expanding into Vacuum

Abstract

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.

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Document Details

Document Type
Technical Report
Publication Date
Jul 13, 2005
Accession Number
ADA445940

Entities

People

  • A. N. Kudryavtsev
  • D. V. Khotyanovsky
  • M. S. Ivanov
  • P. V. Vashchenkov

Organizations

  • Russian Academy of Sciences

Tags

Communities of Interest

  • Air Platforms
  • Space

DTIC Thesaurus Topics

  • Applied Mechanics
  • Backflow
  • Boundaries
  • Boundary Layer
  • Distribution Functions
  • Flow
  • Flow Rate
  • Fluid Flow
  • Mach Number
  • Mass Flow
  • Mechanics
  • Physics Laboratories
  • Reynolds Number
  • Simulations
  • Spacecraft
  • Two Dimensional
  • Viscous Flow

Fields of Study

  • Physics

Readers

  • Aerospace Propulsion Engineering.
  • Combustion and Flow Dynamics.
  • Computational Fluid Dynamics (CFD)

Technology Areas

  • Space
  • Space - Hall-Effect Thruster