Special Issue “Active Flow Control Technologies for Energy and Propulsive Systems”

Giorgi, Maria Grazia De; Ficarella, Antonio

doi:10.3390/app10010221

Applied Sciences

2019

DOI: 10.3390/app10010221

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Special Issue “Active Flow Control Technologies for Energy and Propulsive Systems”

Maria Grazia De Giorgi

Antonio Ficarella

Abstract: Active flow control (AFC) is a fast-growing, multi-disciplinary science and technology for energy and propulsive systems [...]

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2024

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Experimental Identification of a New Secondary Wave Pattern in Transonic Cascades with Porous Walls

Drăgan,

Dumitrescu,

Gall

et al. 2024

Aerospace

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Turbomachinery shock wave patterns occur as a natural result of operating at off-design points and are accountable for some of the loss in performance. In some cases, shock wave–boundary layer (SW-BLIs) interactions may even lead to map restrictions. The current paper refers to experimental findings on a transonic linear cascade specifically designed to mitigate shock waves using porous walls on the blades. Schlieren visualization reveals two phenomena: Firstly, the shock waves were dissipated in all bladed passages, as predicted by the CFD studies. Secondly, a lower-pressure wave pattern was observed upstream of the blades. It is this phenomenon that the paper reports and attempts to describe. Attempts to replicate this pattern using Reynolds-averaged Navier–Stokes (RANS) calculations indicate that the numerical method may be too dissipative to accurately capture it. The experimental campaign demonstrated a 4% increase in flow rate, accompanied by minimal variations in pressure and temperature, highlighting the potential of this approach for enhancing turbomachinery performance.

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Experimental Identification of a New Secondary Wave Pattern in Transonic Cascades with Porous Walls

Drăgan,

Dumitrescu,

Gall

et al. 2024

Aerospace

View full text Add to dashboard Cite

show abstract

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Special Issue “Active Flow Control Technologies for Energy and Propulsive Systems”

Abstract: Active flow control (AFC) is a fast-growing, multi-disciplinary science and technology for energy and propulsive systems [...]

Cited by 1 publication

References 18 publications

Experimental Identification of a New Secondary Wave Pattern in Transonic Cascades with Porous Walls

Experimental Identification of a New Secondary Wave Pattern in Transonic Cascades with Porous Walls

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