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Airfoil self energizing boundary layer control system

  • US 4,726,548 A
  • Filed: 07/28/1986
  • Issued: 02/23/1988
  • Est. Priority Date: 07/28/1986
  • Status: Expired due to Fees
First Claim
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1. In an elongated airfoil having an upper wall, a lower wall, a forwardly presented and convex front wall, and a trailing edge portion, the combination comprising(a) first partition means in the airfoil extending generally lengthwise thereof, to form with said walls a front chamber and a rear chamber,(b) the front chamber including a section spaced generally lengthwise of the airfoil,(c) certain perforations or slots at and in the forwardly presented front wall associated with said section whereby air is forced into said section to flow therein lengthwise of the airfoil in response to forward travel of the airfoil through the atmosphere, and other perforations in said upper wall adjacent said rear chamber and via which air passing over the airfoil may enter the rear chamber,(d) there being air outlet means in the airfoil via which air in said section and in such rear chamber discharges, whereby air is drawn from said rear chamber to induce boundary layer air entry into the rear chamber via said other perforations,(e) and including isolated storge means in at least one of said chambers.

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