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  • 1
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    Unknown
    Viscoseal performance with rarefied-gas sealant (1973)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: A fundamental study of viscoseals having a rarefied gas as the sealant was conducted. Both experimental and analytical investigations are reported. Three different analytical models were formulated and are described in detail. An experimental investigation was conducted on multiple grooved two-inch diameter viscoseals over a wide range of gas densities and shaft speeds up to 30,000 rpm. Comparisons are presented between actual viscoseal performance and the theoretical predictions for both sealing coefficient and net leakage parameters as functions of the degree of gas rarefication. Recommendations are presented for the use of the analytical models.
    Keywords: MACHINE ELEMENTS AND PROCESSES
    Type: NASA-CR-121089 , AE-71-023-9
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 2
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    Performance of continuum gas viscoseals. (1971)
    In:  Other Sources
    Details
    Publication Date: 2019-06-27
    Description: Viscoseals performance as predicted by three different analytical models is compared with experimental data for air as the continuum gas sealant. An experimental investigation has been conducted on two multiple-grooved two-inch diameter viscoseals up to shaft speeds of 35,000 rpm. The two seal geometries considered differ significantly insofar as groove aspect ratio is concerned. The results of this continuum investigation of sealing coefficient for the gas viscoseals suggest that the Boon and Tal model is a good design tool for the laminar continuum regime provided it is restricted to high aspect ratio groove applications.
    Keywords: MACHINE ELEMENTS AND PROCESSES
    Format: text
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    NASA TECHNICAL REPORTS
  • 3
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    Unknown
    Viscoseal performance with rarefied-gas sealant (1971)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: A fundamental study of viscoseals having a rarefied gas as the sealant has been conducted. Both experimental and analytical investigations are reported. Three different analytical models have been formulated and are described in detail. An experimental investigation has been conducted on multiple grooved two-inch diameter viscoseals over a wide range of gas densities and shaft speeds up to 30,000 rpm. Comparisons are presented between actual viscoseal performance and the theoretical predictions for both sealing coefficient and net leakage parameters as functions of the degree of gas rarefication. Recommendations are presented for the use of the analytical models.
    Keywords: MACHINE ELEMENTS AND PROCESSES
    Type: NASA-CR-120911 , AE-71-023-9
    Format: application/pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
  • 4
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    Unknown
    Viscoseal performance for rarefied gas sealant. (1971)
    In:  Other Sources
    Details
    Publication Date: 2019-07-27
    Description: Viscoseal performance as predicted by three different analytical models is compared with experimental data for a rarefied gas sealant. An experimental investigation has been conducted on two multiple grooved two-inch diameter viscoseals over a wide range of gas densities and shaft speeds up to 30,000 rpm. The two seal geometries considered differ significantly insofar as groove aspect ratio is concerned. Two types of seal performances are presented in the form of net leakage operation and sealing coefficient performance as functions of the degree of gas rarefication. Although the analytical models correctly predict sealing trends, all of the models are shown to have some deficiencies which prevent their indiscriminate application.
    Keywords: MACHINE ELEMENTS AND PROCESSES
    Format: text
    Location Call Number Expected Availability
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    NASA TECHNICAL REPORTS
  • 5
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    Unknown
    Theoretical performance of rarefied-gas viscoseals (1970)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: Rarefied gas viscoseals performance prediction by theoretical model, comparing results with experiment
    Keywords: MACHINE ELEMENTS AND PROCESSES
    Type: ASLE PREPRINT 70AM 5C-3 , AMERICAN SOCIETY OF LUBRICATION ENGINEERS, ANNUAL MEETING, 25TH; May 04, 1970 - May 08, 1970; CHICAGO, IL
    Format: text
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    NASA TECHNICAL REPORTS
  • 6
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    Rarefied-gas viscoseal (1971)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: Sealing coefficient and leakage performance model for multiple thread rarefied gas viscoseals
    Keywords: MACHINE ELEMENTS AND PROCESSES
    Type: LUBRICATION CONFERENCE; Oct 13, 1970 - Oct 15, 1970; CINCINNATI, OH; US|; 35 (
    Format: text
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