Accession Number:

ADA374704

Title:

Measurements of Skin Friction in Channel Flow

Descriptive Note:

Final rept. 1 Mar-31 Nov 1998

Corporate Author:

BROWN UNIV PROVIDENCE RI DIV OF APPLIED MATHEMATICS

Personal Author(s):

Report Date:

1999-04-26

Pagination or Media Count:

2.0

Abstract:

The purpose of these experiments have been to measure the effect of passive means for affecting the skin friction in channel flow. Early measurements indicated that a semi-random distribution of chevrons with a thickness of 5 to 6 wall units could reduce the overall friction in the channel by as much as 12, whereas the same type of chevrons uniformly spaced increased the channel friction by 20. The measurements where these results were obtained were made in a portion of the channel that had not yet reached fully developed channel flow properties.

Subject Categories:

  • Fluid Mechanics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE