Shock wave strength reduction by passive control using perforated plates

Doerffer, Piotr; Szulc, Oskar

doi:10.1007/s11630-007-0097-z

Cited by 15 publications

(7 citation statements)

References 8 publications

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“…Considering the first approach, examples are found in the studies by Bur et al 1997 andDoerffer andSzluc 2002. Considering the second objective, various systems have been imagined.…”

Section: Introductionmentioning

confidence: 99%

Effect of air jet vortex generators on a shock wave boundary layer interaction

Souverein

Debiève

2010

Exp Fluids

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The effect of upstream injection by means of continuous air jet vortex generators (AJVGs) on a shock wave turbulent boundary layer interaction is experimentally investigated. The baseline interaction is of the impinging type, with a flow deflection angle of 9.5°and a Mach number M e = 2.3. Considered are the effects of the AJVGs on the upstream boundary layer flow topology and on the spatial and dynamical characteristics of the interaction. To this aim, Stereoscopic Particle Image Velocimetry has been employed, in addition to hot-wire anemometry (HWA) for the investigation of the unsteady characteristics of the reflected shock. The AJVGs cause a reduction of the separation bubble length and height. In addition, the energetic frequency range of the reflected shock is increased by approximately 50%, which is in qualitative agreement with the smaller separation bubble size.

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“…Considering the first approach, examples are found in the studies by Bur et al 1997 andDoerffer andSzluc 2002. Considering the second objective, various systems have been imagined.…”

Section: Introductionmentioning

confidence: 99%

Effect of air jet vortex generators on a shock wave boundary layer interaction

Souverein

Debiève

2010

Exp Fluids

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“…As a result, the net drag reduction was negligible. Nonetheless, under ideal flow conditions, a shallow cavity with a porous wall was proved to be very efficient in regulating SBLIs over a plain surface at a supersonic level of maximum Mach number of 1.35 [124]. The use of a porous surface effectively converts normal shock to lambda shock.…”

Section: Passive Control Techniquesmentioning

confidence: 99%

Survey of control techniques to alleviate repercussions of shock-wave and boundary-layer interactions

Jana

Kaushik

2022

Adv. Aerodyn.

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The primary focus of the present survey is to categorize the results of various investigations on the Shock/Boundary-Layer Interactions (SBLIs), their repercussions, and the effective ways to control them. The interactions of shock waves with the boundary layer are an important area of research due to their ubiquity in several applications ranging from transonic to hypersonic flows. Therefore, there is a need for a detailed inspection to understand the phenomena to predict its characteristics with certain accuracy. Considering this in mind, this article presents some key features of the physical nature of SBLIs, their consequences, and the control techniques in a sequential manner; in particular, the passive control techniques for the supersonic and hypersonic intakes are reviewed in detail.

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“…In experimental studies on perforated plates, it is usual to determine the characteristics of such a plate, i.e., the dependence of the pressure drop across the plate as a function of the mass flow rate. Such formulas are then successfully applied in numerical simulations [ 22 ]. The problem in experiments using perforated plates is less important that the hole channel performed by the laser is not actually cylindrical, as this feature can be taken into account in aerodynamic perforation.…”

Section: Introductionmentioning

confidence: 99%

Influence of Holes Manufacture Technology on Perforated Plate Aerodynamics

Grzelak

Szwaba

2021

Materials

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Transpiration flow is a very important and still open subject in many technical applications. Perforated walls are useful for the purpose of “flow control”, as well as for the cooling of walls and blades (effusive cooling) in gas turbines. We are still not able to include large numbers of holes in the numerical calculations and therefore we need physical models. Problems are related also to the quality of the holes in perforated plates. The present transpiration analysis concerns with experimental investigations of the air flow through perforated plates with microholes of 125 and 300 µm diameters. A good accordance of the results with other experiments, simulations and theory was obtained. The received results very clearly show that technology manufacturing of plate holes influences on their aerodynamic characteristics. It turned out that the quality of the plate microholes using laser technology and, consequently, the shape of the hole, can affect the flow losses. Therefore, this effect was investigated and the flow characteristics in both directions were measured, i.e., for two plate settings.

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Shock wave strength reduction by passive control using perforated plates

Cited by 15 publications

References 8 publications

Effect of air jet vortex generators on a shock wave boundary layer interaction

Effect of air jet vortex generators on a shock wave boundary layer interaction

Survey of control techniques to alleviate repercussions of shock-wave and boundary-layer interactions

Influence of Holes Manufacture Technology on Perforated Plate Aerodynamics

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