The control of laminar separation bubbles using high- and low-amplitude forcing
Publicated to:Iutam Symposium On Flow Control And Mems. 7 191-197 - 2008-12-01 7(), DOI: 10.1007/978-1-4020-6858-4_22
Authors: Simens, Mark Phil; Jimenez, Javier;
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Abstract
Two-dimensional simulations are used to demonstrate the existence of two different amplitude regimes to control laminar separation bubbles with periodic zero-mass-flux wall jets. One is based primarily on a shear-layer instability found using low-amplitude forcing. The minimum bubble length is obtained for a Strouhal number approximately equal to 0.018, based on a properly defined momentum thickness. Higher forcing is found to create large vortices, which are responsible for very effective control. A relation is presented between the forcing parameters and the size of the vortices. These estimates are then used to explain the range of effective frequencies to control the separation bubble.
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Leadership analysis of institutional authors
This work has been carried out with international collaboration, specifically with researchers from: United States of America.
There is a significant leadership presence as some of the institution’s authors appear as the first or last signer, detailed as follows: Last Author (JIMENEZ SENDIN, JAVIER).