LES of synthetic jets in boundary layer with laminar separation caused by adverse pressure gradient

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dc.contributor.author Ozawa, Tetsuya en_US
dc.contributor.author Lesbros, Samuel en_US
dc.contributor.author Hong, Guang en_US
dc.contributor.editor en_US
dc.date.accessioned 2011-02-07T06:22:31Z
dc.date.available 2011-02-07T06:22:31Z
dc.date.issued 2010 en_US
dc.identifier 2009005210 en_US
dc.identifier.citation Ozawa Tetsuya, Lesbros Samuel, and Hong Guang 2010, 'LES of synthetic jets in boundary layer with laminar separation caused by adverse pressure gradient', Elsevier, ScieceDirect for Online, vol. 39, no. 5, pp. 845-858. en_US
dc.identifier.issn 0045-7930 en_US
dc.identifier.other C1 en_US
dc.identifier.uri http://hdl.handle.net/10453/13526
dc.description.abstract In the development of synthetic jet actuators (SJAs) for active flow control, numerical simulation has played an important role. In controlling the boundary layer flow separation, an integrated numerical model which includes both the baseline flow and the SJA is still in its initial stage of development. This paper reports preliminary results of simulating the interaction between a synthetic jet and a laminar separation bubble caused by adverse pressure gradient in a boundary layer. The computational domain was three-dimensional and Large-eddy simulation (LES) was adopted. The initial and boundary conditions were defined using or referring to our wind tunnel experimental results. Prior to numerically simulating the interaction between the synthetic jets and the baseline flow, a numerical model for simulating the separation bubble was developed and verified. In the numerical model including the SJA, the synthetic jet velocity at the exit of the SJA was defined as an input. The numerical model was further verified by comparing the simulation with experimental results. Based on reasonable agreement between the numerical and experimental results, simulations were carried out to investigate the dependency of flow control using synthetic jets on the forcing frequency, focused on the lower frequency range of the Tollmien?Schlichting (T?S) instability, and on the forcing amplitude which was represented by the maximum jet velocity at the exit of the SJA. Supporting the hypothesis based on the experiment, LES results showed that the forcing frequency had stronger influence on SJA?s effective elimination of the separation bubble than the forcing amplitude did. en_US
dc.language en_US
dc.publisher Elsevier, ScieceDirect for Online en_US
dc.relation.hasversion Accepted manuscript version en_US
dc.relation.isbasedon http://dx.doi.org/10.1016/j.compfluid.2009.12.012 en_US
dc.rights NOTICE: this is the author’s version of a work that was accepted for publication in Computers & Fluids. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Computers & Fluids, [Volume 39, Issue 5, May 2010, Pages 845–858] DOI# http://dx.doi.org/10.1016/j.compfluid.2009.12.012 en_US
dc.title LES of synthetic jets in boundary layer with laminar separation caused by adverse pressure gradient en_US
dc.parent Computers & Fluids en_US
dc.journal.volume 39 en_US
dc.journal.number 5 en_US
dc.publocation USA en_US
dc.identifier.startpage 845 en_US
dc.identifier.endpage 858 en_US
dc.cauo.name FEIT.School of Elec, Mech and Mechatronic Systems en_US
dc.conference Verified OK en_US
dc.for 091300 en_US
dc.personcode 10138838 en_US
dc.personcode 10350852 en_US
dc.personcode 900424 en_US
dc.percentage 100 en_US
dc.classification.name Mechanical Engineering en_US
dc.classification.type FOR-08 en_US
dc.edition en_US
dc.custom en_US
dc.date.activity en_US
dc.location.activity en_US
dc.description.keywords Synthetic jet actuator, Micro sensor, Numerical modeling, Flow control en_US
dc.staffid en_US
dc.staffid 900424 en_US

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