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  • NONMETALLIC MATERIALS  (2)
  • THERMODYNAMICS AND COMBUSTION  (2)
  • INSTRUMENTATION AND PHOTOGRAPHY  (1)
  • 1
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    Seeding materials: Health and safety considerations (1985)
    In:  CASI
    Details
    Publication Date: 2016-06-07
    Description: The choice of a proper seeding material for laser velocimeters must include health and safety considerations. Failure to do so can lead to catastrophic results. All materials are toxic, and laser velocimeter seeding materials are no exception. Toxicity may be considered an inherent property of a given material. The manifestation of that property or the physiological response to the material is dependent on dose and exposure conditions. An approximate physiological classification of toxicity is given in tablular form. Toxicity in some situations is not necessarily the most restrictive factor in selection of materials. It is also very important to consider how the material is used so that actual exposure to the material in a damaging form can result. For example, nickel and cadmium are both extremely toxic as systemic poisons and in the case of nickel as a carcinogen. Seeding materials are dispersed in air under conditions that favor personnel exposure. Dispersal equipment is frequently if not normally manned, and personnel are often required to make frequent adjustments to assure proper operations.
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: Wind Tunnel Seeding Systems for Laser Velocimeters; p 211-219
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 2
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    Enthalpy calculated from pressure and flow- rate measurements in high-temperature subsonic streams (1965)
    In:  CASI
    Details
    Publication Date: 2019-05-24
    Description: Enthalpy calculation from pressure and flow rate measurements in high temperature subsonic streams
    Keywords: THERMODYNAMICS AND COMBUSTION
    Type: NASA-TN-D-3013
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 3
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    Charts for approximate thermodynamic properties of nitrogen-oxygen mixtures (1965)
    In:  CASI
    Details
    Publication Date: 2019-05-23
    Description: Charts for equilibrium thermodynamic properties of nitrogen-oxygen mixtures under extreme pressure and temperature ranges
    Keywords: THERMODYNAMICS AND COMBUSTION
    Type: NASA-SP-3017
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 4
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    Evaluation of a low-density polyimide foam in a dynamic, high temperature environment (1977)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: A low density polyimide foam material was tested in an arc tunnel to determine its potential for heat shield application on aerospace vehicles. The results show that the material has some reuse potential at surface temperatures as high as 750 K. When a black refractory paint was applied to the surface of the material, the surface recession was negligible at 750 K. An analytical thermal conductivity was derived for this material which, combined with measured thermal property values, can be used to make preliminary design thickness calculations for heat shield applications.
    Keywords: NONMETALLIC MATERIALS
    Type: NASA-TP-1049 , L-11739
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 5
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    Surface recession characteristics of a cryogenic insulation subjected to arc-tunnel heating (1975)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: Specimens of a cryogenic insulation, proposed for use on the space shuttle external tank, were tested in an arc tunnel over a range of heating rates, pressures, and enthalpies corresponding to the shuttle ascent environment. A regression analysis was used to correlate the test data. Correlation equations involving surface recession rate as a function of heating rate, pressure, and enthalpy were developed. These equations can be used to make total surface recession predictions for shuttle ascent flight environments.
    Keywords: NONMETALLIC MATERIALS
    Type: NASA-TM-X-3291 , L-10371
    Format: application/pdf
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    NASA TECHNICAL REPORTS
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