Accession Number:

ADA273243

Title:

Active Control of Oscillatory Lift Forces on a Circular Cylinder

Descriptive Note:

Professional paper

Corporate Author:

NAVAL COMMAND CONTROL AND OCEAN SURVEILLANCE CENTER RDT AND E DIV SAN DIEGO CA

Report Date:

1993-08-01

Pagination or Media Count:

11.0

Abstract:

The results of a computational and experimental study of feedback control of Karman vortex shedding behind a circular cylinder are presented. The experiments were performed in a nominally two dimensional flow around a 12.7 mm cylinder at Reynolds numbers up to 10,000. The computations utilized the two- dimensional Navier-Stokes equations at Reynolds numbers up to 100. In both experimental and numerical studies blowing and suction slots were used to control the vortex shedding. In the numerical study complete suppression of vortex shedding is achieved up to a Reynolds number Re 80 about 70 above the onset Reynolds number for vortex shedding. In the experimental study using the fluctuating lift force as feedback, about 50 suppression of the rms fluctuations has been achieved at a Reynolds number of approximately 10,000. Ocean technology, Fluid mechanics

Subject Categories:

  • Physical and Dynamic Oceanography
  • Fluid Mechanics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE