Accession Number:

ADA123952

Title:

The Aerodynamic Performance of Several Flow Control Devices for Internal Flow Systems.

Descriptive Note:

Technical paper,

Corporate Author:

NATIONAL AERONAUTICS AND SPACE ADMINISTRATION WASHINGTON DC

Report Date:

1982-12-01

Pagination or Media Count:

49.0

Abstract:

An experimental research and development program was undertaken to develop and document new flow-control devices for use in the major modifications to the 40- by 80-Foot Wind Tunnel at Ames Research Center. These devices, which are applicable to other facilities as well, included grid-type and quasi-two-dimensional flow straighteners, louver panels for valving, and turning-vane cascades with net turning angles from 0 deg to 90 deg. The tests were conducted at model scale over a Reynolds number range from 200,000 to 1,700,000, based on chord. The results showed quantitatively the performance benefits of faired, low-blockage, smooth-surface straightener systems, and the advantages of curved turning-vanes with hinge-line gaps sealed and a preferred chord-to-gap ratio between 2,5 and 3.0 for 45 deg or 90 deg turns. Author

Subject Categories:

  • Fluid Mechanics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE