Accession Number:

ADA139499

Title:

The Effect of Discrete Spanwise Regions of Bleed on Pseudo-Two Dimensional Base Flow at Transonic Speeds,

Descriptive Note:

Corporate Author:

AERONAUTICAL RESEARCH LABS MELBOURNE (AUSTRALIA)

Personal Author(s):

Report Date:

1983-07-01

Pagination or Media Count:

62.0

Abstract:

A preliminary experimental study of a new type of pseudo-two-dimensional bluff base consisting of a series of rectangular prismatic protrusions spaced along the span with base bleed into the regions between the protrusions is presented. A base geometry was derived which had less drag at subsonic and transonic speeds than the best reported non-bleed arrangement for bleed mass flow coefficients based on the mass flux swept by the model frontal area in the range 0.02 to 0.04. A simple two-dimensional bleed arrangement requires a bleed coefficient greater than 0.08 to achieve the same subsonic base drag.

Subject Categories:

  • Fluid Mechanics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE