Comparative studies on flow control in rectangular S-duct diffuser using submerged-vortex generators

Paul, Akshoy Ranjan; Ranjan, Pritanshu; Patel, Vivek Kumar; Jain, Anuj

doi:10.1016/j.ast.2012.11.014

Cited by 39 publications

(22 citation statements)

References 15 publications

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“…The VG used in the study is designed as per Paul et al [8], of trapezoidal shape, placed normal to the surface, and at various vortex generator angle ( β ). They are staggered as corotating (parallel) and counterrotating (V-shape) configurations as shown in Figure 2.…”

Section: Experimental Methodologymentioning

confidence: 99%

“…The configuration employing the largest vortex generator was most effective in reducing distortion but did not produce major total pressure recovery. In a recent study, Paul et al [8] showed the usefulness of fin-type submerged VG in flow improvement of an S-shaped diffusing duct. In another study, Paul et al [9, 10] used similar VGs in a twin air-intake duct for flow control, especially at the AIP.…”

Section: Introductionmentioning

confidence: 99%

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Experimental Studies of Active and Passive Flow Control Techniques Applied in a Twin Air‐Intake

Paul

Joshi

Jindal

et al. 2013

The Scientific World Journal

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The flow control in twin air-intakes is necessary to improve the performance characteristics, since the flow traveling through curved and diffused paths becomes complex, especially after merging. The paper presents a comparison between two well-known techniques of flow control: active and passive. It presents an effective design of a vortex generator jet (VGJ) and a vane-type passive vortex generator (VG) and uses them in twin air-intake duct in different combinations to establish their effectiveness in improving the performance characteristics. The VGJ is designed to insert flow from side wall at pitch angle of 90 degrees and 45 degrees. Corotating (parallel) and counterrotating (V-shape) are the configuration of vane type VG. It is observed that VGJ has the potential to change the flow pattern drastically as compared to vane-type VG. While the VGJ is directed perpendicular to the side walls of the air-intake at a pitch angle of 90 degree, static pressure recovery is increased by 7.8% and total pressure loss is reduced by 40.7%, which is the best among all other cases tested for VGJ. For bigger-sized VG attached to the side walls of the air-intake, static pressure recovery is increased by 5.3%, but total pressure loss is reduced by only 4.5% as compared to all other cases of VG.

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Section: Experimental Methodologymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Experimental Studies of Active and Passive Flow Control Techniques Applied in a Twin Air‐Intake

Paul

Joshi

Jindal

et al. 2013

The Scientific World Journal

Self Cite

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show abstract

“…A number of previous studies have investigated the use of passive flow control to reduce the steady distortion at the AIP for both rectangular [17][18][19] and circular ducts [11,[20][21][22][23]. Generally, in the form of arrays of co-rotating vortex generators (VGs), passive flow control devices are used to modify the secondary flows inside the duct.…”

Section: Fig 1 S-duct Geometry Definitionmentioning

confidence: 99%

Passive Flow Control Study in an S-Duct Using Stereo Particle Image Velocimetry

et al. 2017

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“…It was focused on turbulent boundary layer control by means of synthetic jet, blowing, jet vortex generators and various types of fixed vortex generators 10 . A fixed (solid) type and jet vortex generators have been investigated for basic flow cases as well as for the complex configurations and applications [11][12][13][14] . Application of flow control devices effect on shock wave induced separation has been widely investigated within a framework of European Projects: UFAST (Unsteady Effects on Shock Wave Induced Separation) 15 and TFAST (Transition Location Effect on Shock Wave Boundary Layer Interaction).…”

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confidence: 99%

Comparison of vortex generators effect on shock wave induced separation

Flaszyński

2016

8th AIAA Flow Control Conference

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Application of Jet Vortex Generator and Rod Vortex Generator and its effect on the shock wave induced separation is compared. Experimental investigations have been carried out in the test section with curved wall. The flow in the curved nozzle accelerates along the lower wall creating a local supersonic zone. Upstream of the shock wave, Mach number is 1.43 and the boundary layer separation appears downstream. In the paper, the effect of both vortex generators on the separation is presented by means of: the boundary layer measurements, static pressure distribution at the wall, oil flow visualisation and schlieren pictures. Nomenclature D = diameter h = rod height L = spanwise distance JVG = jet vortex generator M = Mach number RVG = rod vortex generator Ps = static pressure P0 = total inlet pressure U' = velocity fluctuations U'noVG = velocity fluctuations for reference case VG = vortex generator X, Y, Z = cartesian coordinates 99 = boundary layer thickness 1= displacement thickness ϕ = pitch angle (jet or rod)  = skew angle (jet or rod)

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Comparative studies on flow control in rectangular S-duct diffuser using submerged-vortex generators

Cited by 39 publications

References 15 publications

Experimental Studies of Active and Passive Flow Control Techniques Applied in a Twin Air‐Intake

Experimental Studies of Active and Passive Flow Control Techniques Applied in a Twin Air‐Intake

Passive Flow Control Study in an S-Duct Using Stereo Particle Image Velocimetry

Comparison of vortex generators effect on shock wave induced separation

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