Slush Hydrogen (SLH2) Technology Development for Application to the National Aerospace Plane (NASP)

  • Richard L. DeWitt
  • Terry L. Hardy
  • Margaret V. Whalen
  • G. Paul Richter
Part of the Advances in Cryogenic Engineering book series (ACRE, volume 35)


The NASP program is giving us the opportunity to reach new unique answers in a number of engineering categories. The answers are considered “enhancing technology” or “enabling technology”. Airframe materials and densified propellants are examples of “enabling” technology.

The National Aeronautics and Space Administration’s Lewis Research Center has the task of providing the technology data which will be used as the basis to decide if slush hydrogen (SLH2) will be the fuel of choice for the NASP. The objectives of this NASA Lewis program are (1) to provide, where possible, verified numerical models of fluid production, storage, transfer, and feed systems, and (2) to provide verified design criteria for other engineered aspects of SLH2 systems germane to a NASP. This program is a multiyear multimillion dollar effort. The present pursuit of the above listed objectives is multidimensional, covers a range of problem areas, works these to different levels of depth, and takes advantage of the resources available in private industry, academia, and the U.S. Government.

This paper will be a summary of the NASA Lewis overall program plan. The initial implementation of the plan will be unfolded and the present level of efforts in each of the resource areas will be discussed. Results already in hand will be pointed out. The paper will conclude with a description of additionally planned near-term experimental and analytical work.


Triple Point Feed System Magnetic Refrigeration Normal Boiling Point NASA Lewis Research 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


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Copyright information

© Springer Science+Business Media New York 1990

Authors and Affiliations

  • Richard L. DeWitt
    • 1
  • Terry L. Hardy
    • 1
  • Margaret V. Whalen
    • 1
  • G. Paul Richter
    • 1
  1. 1.Lewis Research CenterNational Aeronautics and Space AdministrationClevelandUSA

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