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Microgravity Research in Support of Technologies for the Human Exploration and Development of Space and Planetary Bodies (2000) / Chapter Skim
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VII Programmatic Recommendations
Pages 185-188

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From page 185...
... Department of Energy-Naval Reactors program for help in designing research programs that can develop multivariate, physically based, multiphase computational models. In the following paragraphs, suggestions are made concerning goals, research planning, and activities of NASA in support of gravity-related research for HEDS.
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From page 186...
... , phase distribution, phase separation, multiphase turbulence, Marangoni forces, boiling/condensing heat transfer, multiphase pressure drop, static and dynamic instabilities, and condensation-induced loads in reduced-gravity environments. As part of this effort, the dimensionless parameters that characterize the relevant fundamental multiphase phenomena should also be cataloged and the various distinct operational regimes should be identified.
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From page 187...
... Also, new concepts for flow control devices to replace conventional valves should be encouraged and pursued through research, in order to provide long-term reliability and to assure the desired control of dynamic effects in distribution systems. An especially significant example of the need to connect component development with research concerns swirling-flow devices intended to provide the centrifugal force needed for phase separations.
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From page 188...
... development of the necessary autonomous operational principles that will be required to automatically shut down and "safe" complicated processing hardware units during serious system upsets, to serve purposes similar to what is accomplished by methodologies employed currently for spacecraft computer systems that experience unexpected upsets when they are far from Earth. An example of this type of opportunity is the development and extended operation of an autonomous water electrolysis system for the International Space Station that can convert wastewater into oxygen for life support (and hydrogen exhaust)
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Key Terms

  • heat transfer
  • space station
  • international space
  • multiphase flow
  • reduced gravity

  • computational models
  • computational analysis
  • life support
  • space exploration
  • computational model

  • critical heds
  • phase separation
  • nasa research
  • water electrolysis
  • mechanistic models

  • heds technology
  • appropriate research
  • physically based
  • technology issues
  • extended operation

  • novel concepts
  • microgravity data
  • concepts short
  • aircraft engine
  • requiring patience

  • subject future
  • relevant fundamental
  • successfully develop
  • justifies encouragement
  • component development


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