Experimental Analysis of the Effect of Interaction Parameters on Synthetic Jet Actuator Arrays

Hasnain, Zohaib; Flatau, Alison B.; Hubbard, James E.; Sassoon, Aaron M.; Weinstein, Rose

doi:10.2514/6.2013-2475

Cited by 2 publications

(2 citation statements)

References 7 publications

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“…3. The plate was tested at an array momentum coefficient 21 value of approximately 14%, based on a plate length of 0.47 m.…”

Section: Experimental Parameters Design and Testing Methodologymentioning

confidence: 99%

“…The purpose of the second SJA was to ensure that the momentum coefficient, Cµ over the entire airfoil stayed close to 8%. The array momentum coefficient was experimentally determined using a previously derived method that is detailed in reference 21 . The Reynolds number, Re, associated with this flow is approximately 110,000, which falls in the range of low speed small unmanned air vehicle (SUAV) flight.…”

Section: Experimental Parameters Design and Testing Methodologymentioning

confidence: 99%

See 1 more Smart Citation

Dynamic Flow Control over Aerodynamic Bodies using Phased Array Vectored Synthetic Jet Actuation

Hasnain

Trollinger

Hubbard

et al. 2015

33rd AIAA Applied Aerodynamics Conference

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An experimental investigation into the flow control capabilities of synthetic jet actuators (SJAs) was performed. An array consisting of two synthetic jet actuators was designed and fabricated. The effects of vectoring an array on streamline location and pressure distribution were studied using Particle Image Velocimetry (PIV) and static pressure measurements. Three different bodies were tested: a flat plate, a two-dimensional cylinder representative of a bluff body, and a modified two-dimensional NACA 0018 airfoil representative of a streamlined body. Actuation was performed at Array Momentum Coefficient (Cµ) values ranging from 0.8% to 8%. The relative phase of operation, ϕ, of the individual actuators in the array was varied to control the direction of the jet trajectory. PIV was used to study the streamline deflection pattern over a flat plate. A significant change in streamline deflection pattern was observed in response to changing the phase. For the case of the cylinder, actuator arrays were placed at +/-70° locations with respect to the free stream direction. Actuation was performed at a momentum coefficient value of approximately 0.8% and the phase was varied. Pressure measurements were made over the surface of the cylinder. A 10% decrease in pressure drag was observed for specific cases of phasing. Pressure measurements indicated that the point of separation, in response to actuation at this specific phase angle, was delayed by approximately 20°. An array of actuators was also embedded in a modified NACA 0018 airfoil subjected to a low speed cross-flow. The pressure coefficient (CP) was calculated over the surface. For this case, vectored actuation resulted in a reduction in pressure drag and a simultaneous increase in lift. The benefits of phased actuation over different types of aerodynamic bodies are demonstrated and analyzed using different experimental methods. Nomenclature φ = Operating phase difference between array actuators 1 and 2 b = Streamwise dimension of orifice (width) c = Characteristic Length Scale (used for calculating Cμ and F*) Cμ = Actuator/Array Momentum Coefficient (2bUJ 2 / cU 2 ) CD = Drag coefficient CL = Section Lift coefficient

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“…3. The plate was tested at an array momentum coefficient 21 value of approximately 14%, based on a plate length of 0.47 m.…”

Section: Experimental Parameters Design and Testing Methodologymentioning

confidence: 99%

Section: Experimental Parameters Design and Testing Methodologymentioning

confidence: 99%

Dynamic Flow Control over Aerodynamic Bodies using Phased Array Vectored Synthetic Jet Actuation

Hasnain

Trollinger

Hubbard

et al. 2015

33rd AIAA Applied Aerodynamics Conference

Self Cite

View full text Add to dashboard Cite

show abstract

Experimental investigations for parametric effects of dual synthetic jets on delaying stall of a thick airfoil

Zhao

et al. 2016

Chinese Journal of Aeronautics

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Experimental Analysis of the Effect of Interaction Parameters on Synthetic Jet Actuator Arrays

Cited by 2 publications

References 7 publications

Dynamic Flow Control over Aerodynamic Bodies using Phased Array Vectored Synthetic Jet Actuation

Dynamic Flow Control over Aerodynamic Bodies using Phased Array Vectored Synthetic Jet Actuation

Experimental investigations for parametric effects of dual synthetic jets on delaying stall of a thick airfoil

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