Optimization of a Fluidic Vortex Generator’s Control in a Transonic Channel Flow

The interaction of a shock wave with a laminar boundary layer was studied at the low supersonic Mach number M = 1.43. The measurements were carried out by particle image velocimetry and hot-wire anemometry. The wide range of Mach numbers in the shear layer occurring in the interaction zone made the analysis of hot-wire anemometer data much more difficult. The paper proposes the method of processing of the hot-wire anemometer data involving the simplified sensor calibration and the data obtained by the particle image velocimetry measurements. Good agreement of the results obtained by two experimental techniques is demonstrated. The data gathered in this work permit simplifying essentially the usage of the hot-wire anemometer technique applied for the study of transonic shear flows.

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Parameter Influence on Porous Bleed Performance for Supersonic Turbulent Flows

Giehler,

Grenson,

Bur

2024

Journal of Propulsion and Power

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Porous bleed systems are a common technique to control shock-/boundary-layer interactions and/or supersonic boundary layers. However, the influence of various design parameters is still unknown. Even though porous bleed models are required to minimize the costs of the design process, they often do not include parameter effects. In the present study, the effect of the plate length, the hole diameter, the porosity level, the thickness-to-diameter ratio, and the stagger angle are investigated by means of three-dimensional Reynolds-averaged Navier–Stokes simulations. The bleed efficiency and the effectiveness in thinning a Mach [Formula: see text] turbulent boundary layer are determined. The findings show a crucial influence of the hole diameter on both the efficiency and effectiveness of the porous bleed. Similar findings are made for the porosity and stagger angle but with a smaller significance. The thickness-to-diameter ratio and plate length are shown to mainly affect the bleed efficiency.

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Optimization of a Fluidic Vortex Generator’s Control in a Transonic Channel Flow

Cited by 3 publications

References 46 publications

Experimental and numerical investigation of porous bleed control for supersonic/subsonic flows, and shock-wave/boundary-layer interactions

Experimental and numerical investigation of porous bleed control for supersonic/subsonic flows, and shock-wave/boundary-layer interactions

Comparison of hot-wire and particle image velocimetry measurements in the zone of interaction of a shock wave with a boundary layer at Mach number of 1.43

Parameter Influence on Porous Bleed Performance for Supersonic Turbulent Flows

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