Accession Number:

ADA002312

Title:

Effects of Transverse Ribs on Pressure Recovery in Two-Dimensional Subsonic Diffusers.

Descriptive Note:

Final rept. Jul-Nov 71,

Corporate Author:

AIR FORCE AERO PROPULSION LAB WRIGHT-PATTERSON AFB OHIO

Personal Author(s):

Report Date:

1974-10-01

Pagination or Media Count:

42.0

Abstract:

An experimental investigation was conducted to evaluate the performance of two-dimensional ribbed diffusers. Static pressure recovery of a straight wall diffuser and a corresponding ribbed diffuser was obtained over a wide range of diffuser total angles and subsonic Mach numbers for three diffuser length-to-throat width ratios. At selected geometries, total pressure recovery and distortion index were obtained. In addition to an optimum rectangular rib design, obtained from earlier water table flow visualization test, a chamfered rib and a roughened surface insert were also tested. A high response pressure transducer was used to detect pressure fluctuations occurring within one of the inter-rib cavities.

Subject Categories:

  • Aerodynamics
  • Fluid Mechanics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE