A computational analysis and design methodology is presented for effective microflow control using synthetic jets. The membrane is modeled as a moving boundary to accurately compute the flow inside the jet cavity. Compressible Navier-Stokes equations are solved with boundary conditions for the wall slip and the temperature jump conditions encountered for a specific range of Knudsen numbers. For validation, microchannel flow and microfilter flow are successfully computed. Then, flow past a backward-facing step in a microchannel is considered. Analysis is coupled with a design methodology to improve the actuator effectiveness. The objective function is selected to be the square of the vorticity (enstrophy) integrated over a separated region. First, from a design of experiments study, orifice and actuator cavity widths are identified as the most effective design variables. Then, a response surface method is constructed to find the improved control of the flow. This optimization results in more than 83% reduction of the enstrophy of the recirculation region.
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e-mail: obaysal@odu.edu
e-mail: mkoklu@odu.edu
e-mail: nerbas@odu.edu
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September 2006
Technical Papers
Design Optimization of Micro Synthetic Jet Actuator for Flow Separation Control
Oktay Baysal,
Oktay Baysal
Professor, Eminent Scholar and Dean
Frank Batten College of Engineering and Technology,
e-mail: obaysal@odu.edu
Old Dominion University
, Norfolk, VA 23529-0236
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Mehti Köklü,
Mehti Köklü
Graduate Research Assistant
Frank Batten College of Engineering and Technology,
e-mail: mkoklu@odu.edu
Old Dominion University
, Norfolk, VA 23529-0236
Search for other works by this author on:
Nurhak Erbaş
Nurhak Erbaş
Graduate Research Assistant
Frank Batten College of Engineering and Technology,
e-mail: nerbas@odu.edu
Old Dominion University
, Norfolk, VA 23529-0236
Search for other works by this author on:
Oktay Baysal
Professor, Eminent Scholar and Dean
Frank Batten College of Engineering and Technology,
Old Dominion University
, Norfolk, VA 23529-0236e-mail: obaysal@odu.edu
Mehti Köklü
Graduate Research Assistant
Frank Batten College of Engineering and Technology,
Old Dominion University
, Norfolk, VA 23529-0236e-mail: mkoklu@odu.edu
Nurhak Erbaş
Graduate Research Assistant
Frank Batten College of Engineering and Technology,
Old Dominion University
, Norfolk, VA 23529-0236e-mail: nerbas@odu.edu
J. Fluids Eng. Sep 2006, 128(5): 1053-1062 (10 pages)
Published Online: March 8, 2006
Article history
Received:
August 10, 2005
Revised:
March 8, 2006
Citation
Baysal, O., Köklü, M., and Erbaş, N. (March 8, 2006). "Design Optimization of Micro Synthetic Jet Actuator for Flow Separation Control." ASME. J. Fluids Eng. September 2006; 128(5): 1053–1062. https://doi.org/10.1115/1.2236134
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