Numerical simulation of synthetic jet actuators

Krai, Linda D.; Donovan, John; Cain, Alan B.; Cary, Andrew W.

doi:10.2514/6.1997-1824

Cited by 135 publications

(91 citation statements)

References 8 publications

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“…The fully modeled cavities have some drawback in terms of the grid creation, number of cells etc., but the flow at the cavities' outlets is more realistic. On the other hand same effort has been devoted to applying the surface boundary conditions simulating the flow from actuators and actuation models in the past [7,[9][10][11]. …”

Section: Boundary Conditions and Cfd Solvermentioning

confidence: 99%

Application of Synthetic Jets Actuators in Wing-Pylon Junction Area to Improve the High Lift Performances

Vrchota¹

2016

Proceedings of the VII European Congress on Computational Methods in Applied Sciences and Engineering (ECCOMAS Congress 2016)

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Section: Boundary Conditions and Cfd Solvermentioning

confidence: 99%

Application of Synthetic Jets Actuators in Wing-Pylon Junction Area to Improve the High Lift Performances

Vrchota¹

2016

Proceedings of the VII European Congress on Computational Methods in Applied Sciences and Engineering (ECCOMAS Congress 2016)

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“…Amitay et al [1] demonstrated the usage of synthetic jets in delaying separation. Further works on synthetic jets included two-dimensional simultions in quiescent flow conditions by Kral et al [10] and Lee and Goldstein [11]. Moreover, Sahni et al [13] have studied, both experimentally and numerically, the three-dimensional flow interactions between a finite-span synthetic jet and a crossflow, using a chord-based model.…”

Section: Introductionmentioning

confidence: 99%

Numerical Simulation of a Synthetic Jet with OpenFOAM

Liu

Kazakidi

Medeiros

et al. 2015

Fluid Mechanics and Its Applications

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Numerical simulations of flow surrounding a synthetic jet actuating device are presented. By modifying a dynamic mesh technique available in OpenFOAM,a well-documented open-source solver for fluid dynamics, detailed computations of the sinusoidal motion of the synthetic jet diaphragm were possible. Numerical solutions were obtained by solving the two dimensional incompressible viscous N-S equations, with the use of a second order implicit time marching scheme and a central finite volume method for spatial discretization in both streamwise and crossflow directions. A systematic parameter study is reported here, in which the external Reynolds number, the diaphragm amplitude and frequency, and the slot dimensions are varied.

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“…In the numerical studies of controlling flow separation using synthetic jets, the boundary condition, numerical model and the grid involved in simulation are very important to attain the stringent requirement for the computational accuracy. A numerical simulation of twodimension, incompressible zero-mass vortex generator jets was conducted by Kral et al (1997). The boundary condition for the outlet of vortex generator jets was described and the velocity distributions at different operating condition were also presented.…”

Section: Introductionmentioning

confidence: 99%

Performance Improvement of Low Pressure Turbine Blade by Using Synthetic Jets

Liu

Wang

2011

Engineering Applications of Computational Fluid Mechanics

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ABSTRACT:In order to investigate the effect of flow separation control using synthetic jets on the performance of a low pressure turbine (LPT) blade, the three-dimensional viscous unsteady Reynolds-averaged Navier-Stokes equations are solved to predict the unsteady flow characteristics of the LPT Pak-B blade with and without synthetic jets. For turbulent flow, shear stress transport (SST) turbulence model coupled with Langtry-Menter transition model is adopted. The numerical results show that the turbulence simulations can describe the flow structure effectively and capture the flow separation and reattachment locations on the suction surface of the Pak-B blade. At low Reynolds numbers, using synthetic jet can effectively suppress or even eliminate the flow separation on the blade suction surface. At Re =25,000 and freestream turbulence intensity FSTI =0.08%, there is a synthetic jet frequency in the range from 0Hz to 50Hz for optimal flow control of the LPT blade. The total pressure loss of the LPT blade decreases by 59%, compared with that of non-synthetic jet blade at the blowing ratio B=2.0 and the optimal jet frequency f=20Hz. In addition, the flow control mechanism of synthetic jets is revealed in detail. A hysteresis is observed in the process of flow control by using synthetic jets to reattach the blade boundary layer flow separation. The hysteresis in the blowing process of synthetic jets and the acquirement of enough time to restrain the separation in the sucking process are the main factors which affect the selection of synthetic jet frequency.

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Numerical simulation of synthetic jet actuators

Cited by 135 publications

References 8 publications

Application of Synthetic Jets Actuators in Wing-Pylon Junction Area to Improve the High Lift Performances

Application of Synthetic Jets Actuators in Wing-Pylon Junction Area to Improve the High Lift Performances

Numerical Simulation of a Synthetic Jet with OpenFOAM

Performance Improvement of Low Pressure Turbine Blade by Using Synthetic Jets

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