Accession Number:

AD0659396

Title:

THE DETECTION OF ELECTRICALLY-INDUCED SECONDARY FLOWS IN A PIPE BY MEANS OF ELECTROSTATIC PROBES

Descriptive Note:

Technical rept.

Corporate Author:

OHIO STATE UNIV RESEARCH FOUNDATION COLUMBUS

Personal Author(s):

Report Date:

1967-08-01

Pagination or Media Count:

54.0

Abstract:

An experimental investigation was conducted to detect the presence of electrically induced secondary flows inside a round pipe. A thin concentric wire in the pipe was impressed with a high positive voltage which generated a corona discharge, producing ions and a radial electric field in the pipe. It was postulated that secondary flows taking the form of vortex flows inside the pipe would result. A technique of utilizing electrostatic probes inserted into the pipe and on the wall provided strong evidence that secondary flows were generated both with and without a primary axial flow. At zero axial flow the characteristic length of the secondary flow was on the order of two pipe diameters. With an axial flow, when the primary and secondary flows are superimposed, various characteristic lengths were observed.

Subject Categories:

  • Aerodynamics
  • Fluid Mechanics
  • Plasma Physics and Magnetohydrodynamics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE