Reduced-Order Model for Efficient Simulation of Synthetic Jet Actuators

Yamaleev, Nail K.; Carpenter, Mark H.; Ferguson, Frederick

doi:10.2514/1.7077

Cited by 20 publications

(13 citation statements)

References 22 publications

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“…The transpiration condition is imposed at the bottom of the slot's neck to simulate the velocity generated by the oscillating diaphragm. Similar boundary condition treatment produced satisfactory results at the CFDVAL2004 workshop, and has also been studied in detail by Yamaleev and Carpenter [23]. They demonstrated that for actuators with deep cavities, specifying the transpiration condition at a distance of at least 4-5 slot widths away from the slot exit produces only a small loss in numerical accuracy.…”

Section: Resultsmentioning

confidence: 70%

Simulation of Synthetic Jets in Quiescent Air Using Unsteady Reynolds Averaged Navier-Stokes Equations

Vatsa

Turkel

2004

22nd Applied Aerodynamics Conference and Exhibit

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We report research experience in applying an Unsteady Reynolds-Averaged Navier-Stokes (URANS) solver for the prediction of time-dependent flows in the presence of an active flow control device. The configuration under consideration is a synthetic jet created by a single diaphragm piezoelectric actuator in quiescent air. Time-averaged and instantaneous data for this case were obtained at Langley Research Center, using multiple measurement techniques. Computational results for this case using one-equation Spalart-Allmaras and two-equation Menter's turbulence models are presented here along with comparisons with the experimental data. The effect of grid refinement, preconditioning and time-step variation are also examined.

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Section: Resultsmentioning

confidence: 70%

Simulation of Synthetic Jets in Quiescent Air Using Unsteady Reynolds Averaged Navier-Stokes Equations

Vatsa

Turkel

2004

22nd Applied Aerodynamics Conference and Exhibit

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“…The advantage is that everything is modelled on a stationary mesh. A promising approach seems to be a hybrid solution using Euler equations for the cavity and full Navier-Stokes for the exterior 34 . Lower-order and analytically-based solutions are very useful for getting a feeling which parameter combinations govern the physics.…”

Section: Lower-order and Hybrid Modelsmentioning

confidence: 99%

Synthetic Jet Cooling Part I: Overview of Heat Transfer and Acoustics

Lasance¹,

Aarts²

2008

2008 Twenty-Fourth Annual IEEE Semionductor Thermal Measurement and Management Symposium

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The paper deals with an overview of the principles of heat transfer and acoustics related to a promising alternative for fans: synthetic jet cooling. After a short discussion of the benefits, the background and the principles underlying the physics are treated. The problems with optimisation through numerical analysis are highlighted. An accompanying paper discusses the experimental results in terms of heat transfer and noise for a special embodiment: an acoustic dipole cooler.

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“…Often, the SJ pressure level is extrapolated from the main flow interior. This practice does not preserve the conservation of mass, momentum and energy (Yamaleev et al 2005), which is a crucial point during the suction phase of the cycle, where pressure is the variable that determines the influx of mass. Moreover, from a numerical point of view, an error is introduced that greatly affects the accuracy, no matter how high the order of the scheme is.…”

Section: Introductionmentioning

confidence: 99%

A computational approach to the simulation of controlled flows by synthetic jets actuators

Ferlauto

Marsilio

2015

Advances in aircraft and spacecraft science

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The paper focuses on the integration of a non-linear one-dimensional model of Synthetic Jet (SJ) actuator in a well-assessed numerical simulation method for turbulent compressible flows. The computational approach is intended to the implementation of a numerical tool suited for flow control simulations with affordable CPU resources. A strong compromise is sought between the use of boundary conditions or zero-dimensional models and the full simulation of the actuator cavity, in view of long-term simulation with multiple synthetic jet actuators. The model is integrated in a multi-domain numerical procedure where the controlled flow field is simulated by a standard CFD method for compressible RANS equations, while flow inside the actuator is reduced to a one-dimensional duct flow with a moving piston. The non-linear matching between the two systems, which ensures conservation of the mass, momentum and energy is explained. The numerical method is successfully tested against three typical test cases: the jet in quiescent air, the SJ in cross flow and the flow control on the NACA0015 airfoil.

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Reduced-Order Model for Efficient Simulation of Synthetic Jet Actuators

Cited by 20 publications

References 22 publications

Simulation of Synthetic Jets in Quiescent Air Using Unsteady Reynolds Averaged Navier-Stokes Equations

Simulation of Synthetic Jets in Quiescent Air Using Unsteady Reynolds Averaged Navier-Stokes Equations

Synthetic Jet Cooling Part I: Overview of Heat Transfer and Acoustics

A computational approach to the simulation of controlled flows by synthetic jets actuators

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