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  • AIRCRAFT DESIGN, TESTING AND PERFORMANCE  (1)
  • INSTRUMENTATION AND PHOTOGRAPHY  (1)
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  • 1
    Publication Date: 2019-06-28
    Description: Wind tunnel and flight tests have recently been conducted by the NASA Langley Research Center to explore the ability of laminar separation hot-film sensors to identify the presence of laminar separation as the principal mode of instability amplification leading to transition. This paper describes the different sensor configurations evaluated during the course of testing and presents results from the flight and wind tunnel evaluations. Plans for the next generation of sensors are briefly discussed.
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: SAE PAPER 871018
    Format: text
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  • 2
    Publication Date: 2019-06-28
    Description: The maintenance of minimum wing leading edge contamination is critical to the preservation of drag-reducing laminar flow; previous methods for the prevention of leading edge contamination by insects have, however, been rendered impractical by their excessive weight, cost, or inconvenience. Attention is presently given to the results of a NASA flight experiment which evaluated the performance of a porous leading edge fluid-discharge ice protection system in the novel role of insect contamination removal; high insect contamination conditions were also noted in the experiment. Very small amounts of the fluid are found to be sufficient for insect contamination protection.
    Keywords: AIRCRAFT DESIGN, TESTING AND PERFORMANCE
    Type: SAE PAPER 850860
    Format: text
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