Noise and Sonic Fatigue of High Lift Devices. Aeroacoustic Loads

Abstract

An extensive experimental program, applicable to externally blown flaps (EBF) of STOL vehicles, was conducted providing detailed information on the surface loads produced during jet impingement. Test specimens used in the program were varied from a simple flat plate to a complicated wing-flaps configuration. An underlying premise concerning the test specimen selection was that simple plate specimens can provide useful data for wing-flaps configurations. The test specimens included flat and curved plates and a wing- flaps model. Data collected from the test cases for each specimen included static pressures and 'single and two-point' statistics of the fluctuating pressures. In addition, temperature data were obtained in flat plate cases for heat transfer studies. These results for each test case are tabulated on layouts of the specimen surfaces showing them in their proper spatial relation to each other. The results are also plotted for ease in recognizing trends produced from parametric variations. The more pronounced trends are discussed along with possible reasons for them.

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Document Details

Document Type
Technical Report
Publication Date
Jul 01, 1977
Accession Number
ADA045950

Entities

People

  • C. M. Ho
  • D. A. Plocher
  • H. L. Leve
  • M. A. Yeneriz

Organizations

  • Douglas

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Aircrafts
  • Boundary Layer
  • Convection
  • Dynamic Pressure
  • Flaps (Control Surfaces)
  • Heat Transfer
  • High Lift Devices
  • Operating Systems
  • Pressure Distribution
  • Pressure Measurement
  • Recording Systems
  • Short Takeoff Aircraft
  • Static Pressure
  • Three Dimensional
  • Turbulent Mixing
  • Two Dimensional
  • Wing Flaps

Fields of Study

  • Physics

Readers

  • Aerospace Engineering
  • Combustion and Flow Dynamics.
  • Mechanical Engineering/Mechanics of Materials.