Accession Number:

ADA605090

Title:

Passive and Active Control of Massively Separated High-Speed Flows

Descriptive Note:

Final rept. 1 Nov 2008-31 Oct 2013

Corporate Author:

ILLINOIS UNIV AT URBANA DEPT OF AEROSPACE ENGINEERING

Personal Author(s):

Report Date:

2014-01-31

Pagination or Media Count:

12.0

Abstract:

This work builds on our previous experimental studies of high-speed separated base flows by performing innovative passive and active flowcontrol experiments on these flowfields. The purpose of these studies is twofold 1 to effect substantial changes in these base flows that will lead to improved flight vehicle performance and 2 to further basic understanding of these complex, separated, compressible, turbulent flowfields. The specific passive-control studies that have been conducted consist of inserting splitter plates into the recirculation region to alter the stability characteristics and structure of the near-wake flowfield. The open-loop active control methods that were employed used electric-arc excitation to force or inhibit specific instability modes for these high-speed separated flows. Two electric-arc actuator types were investigated localized arc-filament plasma actuators and pulsed plasma-jet actuators. In each case, the studies were suggested by our previous experimental investigations that have characterized in detail the uncontrolled flowfields and also by recent DNSstability studies of other workers. This final report summarizes our progress on both the passive splitter plate and active electric-arc control studies.

Subject Categories:

  • Fluid Mechanics
  • Plasma Physics and Magnetohydrodynamics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE