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  • AIRCRAFT DESIGN, TESTING AND PERFORMANCE  (2)
  • AERONAUTICS (GENERAL)  (1)
  • 1
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    Unknown
    Application of porous materials for laminar flow control (1978)
    In:  CASI
    Details
    Publication Date: 2016-06-07
    Description: Fairly smooth porous materials were elected for study Doweave; Fibermetal; Dynapore; and perforated titanium sheet. Factors examined include: surface smoothness; suction characteristics; porosity; surface impact resistance; and strain compatibility. A laminar flow control suction glove arrangement was identified with material combinations compatible with thermal expansion and structural strain.
    Keywords: AIRCRAFT DESIGN, TESTING AND PERFORMANCE
    Type: NASA. Langley Res. Center CTOL Transport Technol., 1978; p 497-522
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 2
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    Unknown
    Development of laminar flow control wing surface porous structure (1984)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: It was concluded that the chordwise air collection method, which actually combines chordwise and spanwise air collection, is the best of the designs conceived up to this time for full chord laminar flow control (LFC). Its shallower ducting improved structural efficiency of the main wing box resulting in a reduction in wing weight, and it provided continuous support of the chordwise panel joints, better matching of suction and clearing airflow requirements, and simplified duct to suction source minifolding. Laminar flow control on both the upper and lower surfaces was previously reduced to LFC suction on the upper surface only, back to 85 percent chord. The study concludes that, in addition to reduced wing area and other practical advantages, this system would be lighter because of the increase in effective structural wing thickness.
    Keywords: AERONAUTICS (GENERAL)
    Type: NASA-CR-172424 , NAS 1.26:172424
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 3
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    Evaluation of laminar flow control systems concepts for subsonic commercial transport aircraft (1983)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: An evaluation was made of laminar flow control (LFC) system concepts for subsonic commercial transport aircraft. Configuration design studies, performance analyses, fabrication development, structural testing, wind tunnel testing, and contamination-avoidance techniques were included. As a result of trade studies, a configuration with LFC on the upper wing surface only, utilizing an electron beam-perforated suction surface, and employing a retractable high-lift shield for contamination avoidance, was selected as the most practical LFC system. The LFC aircraft was then compared with an advanced turbulent aircraft designed for the same mission. This comparison indicated significant fuel savings and reduced direct operating cost benefits would result from using LFC.
    Keywords: AIRCRAFT DESIGN, TESTING AND PERFORMANCE
    Type: NASA-CR-159251 , NAS 1.26:159251 , ACEE-01-FR-3132
    Format: application/pdf
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    NASA TECHNICAL REPORTS
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