Effect of blowing ratio on the relaminarization phenomenon over convex curved wall

Su, Weiyi; Zhang, Fengrui; Wang, Mou-Yuan

doi:10.1007/s10409-021-09072-7

Acta Mech. Sin.

2022

DOI: 10.1007/s10409-021-09072-7

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Effect of blowing ratio on the relaminarization phenomenon over convex curved wall

Weiyi Su

Fengrui Zhang

Mou-Yuan Wang

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2024

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Distortion Control in Intakes Subject to Strong Crosswinds Using Steady Vortex Generator Jets

Issai Arasu,

Shankar Sarvankar,

Vadlamani

2024

AIAA Journal

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Flow separation over the intake lip often occurs in gas turbine engines at off-design conditions such as crosswinds. The distortion transferred to the fan face detrimentally impacts the engine performance. The current study explores the efficacy of steady vortex generator jets (VGJ) to alleviate this flow distortion using high-fidelity implicit large-eddy simulations on a quasi-3D intake. The study reveals that VGJs, strategically placed on the windward side of the intake, induce coherent structures that include cylindrical jet shear layers, horseshoe vortices, and counter-rotating vortex pairs similar to transverse jets in crossflow. Parametric studies are carried out to identify the optimal VGJ location and blowing ratios. Superior flow control is achieved when the VGJs are placed on the windward side closer to the leading edge, reducing the distortion coefficient by [Formula: see text] compared to the uncontrolled case. In contrast, when the VGJs are placed farther from the leading edge, the flow relaminarizes and the coherent structures decay rapidly due to severe acceleration over the intake lip. Consistent with experiments, our computations at higher blowing ratios (VR1.5 and VR2) show an improved pressure recovery decreasing the distortion coefficient by [Formula: see text] due to deeper jet penetration and enhanced mixing.

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Distortion Control in Intakes Subject to Strong Crosswinds Using Steady Vortex Generator Jets

Issai Arasu,

Shankar Sarvankar,

Vadlamani

2024

AIAA Journal

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Effect of blowing ratio on the relaminarization phenomenon over convex curved wall

Cited by 1 publication

References 41 publications

Distortion Control in Intakes Subject to Strong Crosswinds Using Steady Vortex Generator Jets

Distortion Control in Intakes Subject to Strong Crosswinds Using Steady Vortex Generator Jets

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