Accession Number:

AD0662243

Title:

FLOW IN CHANNELS WITH PERMEABLE WALLS,

Descriptive Note:

Corporate Author:

FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OHIO

Report Date:

1967-06-02

Pagination or Media Count:

10.0

Abstract:

The pressure change in a channel with porous walls is described by an equation of motion. The pressure gradient is determined not only by the effect of friction at the wall, which is expressed by the second term on the right hand side of the equation, but also by the dynamic effect connected with transfer due to impulses between the main stream and the outflows. Based on this concept, experiments were carried out in a channel with a diameter of 0.013 meters and a length of 0.1 meters. The section consisted of 270 discs with a thickness of 0.00025 meters and gaps 0.0001 meters between the discs. The outflow from each section was isolated from the other sections and measurements were made of the pressure drop between sections. The experiments were made at rates corresponding to Reynolds numbers from 15,000 to 50,000. Author

Subject Categories:

  • Fluid Mechanics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE