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  • Books
  • Other Sources  (2)
  • MECHANICAL ENGINEERING
  • SOLAR PHYSICS
  • 1985-1989
  • 1970-1974  (2)
  • 1972  (2)
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  • Books
  • Other Sources  (2)
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  • 1985-1989
  • 1970-1974  (2)
Year
  • 1
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    Unknown
    Steady-state and dynamic performance of a gas-lubricated seal (1972)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: Steady-state and dynamic performance of a gas-lubricated, self-acting face seal was determined using numerical methods based on a variable grid, finite-difference, time-transient procedure. Results were obtained for a gas turbine main shaft seal operating at 206.9 newton per square centimeter (300 psi) sealed air pressure and 152.4 meters per second (500 ft/sec) sliding velocity. Analysis of the seal dynamics revealed that the response of the seal nosepiece to runout of the seat face is markedly affected by secondary seal friction and by nosepiece inertia. The nosepiece response was determined for various levels of secondary seal friction and seat face runout magnitudes.
    Keywords: MECHANICAL ENGINEERING
    Type: NASA-CR-121093 , F-C3452-1
    Format: application/pdf
    Location Call Number Expected Availability
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    NASA TECHNICAL REPORTS
  • 2
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    Unknown
    Preliminary design of a Primary Loop Pump Assembly (PLPA), using electromagnetic pumps (1972)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: A preliminary design study of flight-type dc conduction-permanent magnetic, ac helical induction, and ac linear induction pumps for circulating 883 K (1130 F) NaK at 9.1 kg/sec (20 lb/sec) is described. Various electromagnetic pump geometrics are evaluated against hydraulic performance, and the effects of multiple windings and numbers of pumps per assembly on overall reliability were determined. The methods used in the electrical-hydraulic, stress, and thermal analysis are discussed, and the high temperature electrical materials selected for the application are listed.
    Keywords: MECHANICAL ENGINEERING
    Type: NASA-CR-140713 , AI-72-54
    Format: application/pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
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