Propellant Feed Control for Ion Engines.

Abstract

An overview of space electric propulsion (SEP) is presented. Methods of throttling the power levels of electrostatic and electromagnetic thrusters are discussed. Particular attention is given to the concept of thermally-throttling propellant flow using the temperature-viscosity characteristics of xenon gas. The thermoproperties of xenon gas as a function of temperature are determined, and the flow regimes of the propellant at the mass flow rates of interest are studied. The propellant flow is presented separately as Fanno flow and as Rayleigh flow, and then those combined effects are considered. A method for predicting the performance of thermally-throttled systems is presented. Uncertainties in modeling real-world thermal throttling systems are discussed. The possible use of thermal throttling characteristics as a means of propellant pressure regulation is also examined.

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Document Details

Document Type
Technical Report
Publication Date
Jun 01, 1996
Accession Number
ADA316748

Entities

People

  • Dan A. Starling Jr

Organizations

  • Naval Postgraduate School

Tags

DTIC Thesaurus Topics

  • Electric Propulsion
  • Electromagnetic Thrusters
  • Engines
  • Flow
  • Flow Rate
  • Ion Engines
  • Joule Thomson Effect
  • Mass Flow
  • Power Levels
  • Propellants
  • Thrusters

Fields of Study

  • Physics

Readers

  • Aerospace Propulsion Engineering.
  • Business Analytics
  • Fluid Dynamics.

Technology Areas

  • Space
  • Space - Hall-Effect Thruster