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  • 1
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    Highly loaded multi-stage fan drive turbine-tandem blade configuration design (1972)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: The results of the tandem blade configuration design study are reported. The three stage constant-inside-diameter turbine utilizes tandem blading in the stage two and stage three vanes and in the stage three blades. All other bladerows use plain blades. Blading detailed design is discussed, and design data are summarized. Steady-state stresses and vibratory behavior are discussed, and the results of the mechanical design analysis are presented.
    Keywords: PROPULSION SYSTEMS
    Type: NASA-CR-2097
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 2
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    Highly loaded multi-stage fan drive turbine: Leaned stator configuration design (1972)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: The results of the high lift blade configuration design study are reported. The three-stage constant-inside-diameter turbine utilizes a ten degree tangentially leaned stator in stage three. All other bladerows use plain blades. Analysis of the leaned stator is discussed, and detailed design data are summarized. Steady-state stresses are discussed, and the results of the mechanical design analysis are presented.
    Keywords: PROPULSION SYSTEMS
    Type: NASA-CR-2096 , R71AEG309
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 3
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    Principles of stray light suppression and conceptual application to the design of the Diffuse Infrared Background Experiment for NASA's Cosmic Background Explorer (1983)
    In:  Other Sources
    Details
    Publication Date: 2019-07-27
    Description: The Diffuse Infrared Background Experiment (DIRBE) is a 10 band filter photometer that will operate at superfluid helium temperatures. Diffuse galactic and extragalactic infrared radiation in the 1-300 micrometer wavelength region will be measured by the instrument. Polarization measurements will be made for 3 bands in the 1-4 micrometer spectral region. The main sources of unwanted radiation are the sun, earth, thermal radiation from an external sun shield, the moon, the brighter planets and stars, and sky light itself from outside the instrument's nominal one degree square field of view. The system level engineering concepts and the principles of stray light suppression that resulted in the instrument design are presented.
    Keywords: OPTICS
    Type: Generation, measurement and control of stray radiation III; January 18, 19, 1983; Los Angeles, CA
    Format: text
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    NASA TECHNICAL REPORTS
  • 4
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    Highly loaded multi-stage fan drive turbine: Plain blade configuration design (1972)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: The constant-inside-diameter flowpath was scaled for testing in an existing turbine test facility. Blading detailed design is discussed, and design data are summarized. Predicted performance maps are presented. Steady-state stresses and vibratory behavior are discussed and the results of the mechanical design analysis are presented.
    Keywords: PROPULSION SYSTEMS
    Type: NASA-CR-1964 , GE-R71-AEG-242
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 5
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    Experimental investigation of a 4 1/2-stage turbine with very high stage loading factor. 1: Turbine design (1973)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: The results of the Task 1 and 2 turbine design work are reported. Preliminary design is discussed. Blading detailed design data are summarized. Predicted performance maps are presented. Steady-state stresses and vibratory behavior are discussed, and the results of the mechanical design analysis are presented.
    Keywords: PROPULSION SYSTEMS
    Type: NASA-CR-2140
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 6
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    Optical design of the Diffuse Infrared Background Experiment for NASA's Cosmic Background Explorer (1982)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: The conceptual design for a ten-band absolute filter photometer (the Diffuse Infrared Background Experiment) to operate at 2 K and measure galactic and extragalactic infrared radiation in the 1 to 300-micron range and polarization in the 1 to 3.5-micron range is presented, as part of the NASA Cosmic Background Explorer. The telescope optical design, a Gregorian design incorporating bafffles and shades to provide high stray-light rejection, is described. Pupil nonuniformity in the detector-assembly optical design has been limited. It is determined that detector sensitiity requirements can be met, and that the problem of radiation-induced responsivity variations can be solved by minimizing detector-assembly size, providing for in situ thermal annealing, and allowing for frequent detector calibration. Limitations on mirror performance are to be met by fabricating mirrors and structure from the same aluminum 6061 ingot.
    Keywords: OPTICS
    Type: Instrumentation in astronomy IV; Fourth Conference; Mar 08, 1982 - Mar 10, 1982; Tucson, AZ
    Format: text
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    NASA TECHNICAL REPORTS
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