Drag reduction of three-dimensional bodies by base blowing with various gas densities

M. Lorite-Díez; J. I. Jiménez-González; L. Pastur; O. Cadot; C. Martínez-Bazán

doi:10.1103/PhysRevE.102.011101

Drag reduction of three-dimensional bodies by base blowing with various gas densities

M. Lorite-Díez, J. I. Jiménez-González, L. Pastur, O. Cadot, C. Martínez-Bazán

Research output: Contribution to journal › Article › peer-review

Abstract

This study reveals that injecting a light fluid of density ρb in the recirculating bubble of a bluff body at Re≈6.4×104 has a greater drag reduction potential than blowing fluid of a density greater than or equal to that of the free stream ρ. It is found that the maximum drag reduction scales as (ρb/ρ)-16. This power law combines the ability of the recirculating bubble to diffuse the injected momentum and the effectiveness of the injection to increase the recirculating bubble length.

Original language	English
Article number	011101
Journal	Physical Review E
Volume	102
Issue number	1
DOIs	https://doi.org/10.1103/PhysRevE.102.011101
Publication status	Published - 1 Jul 2020
Externally published	Yes

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10.1103/PhysRevE.102.011101

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title = "Drag reduction of three-dimensional bodies by base blowing with various gas densities",

abstract = "This study reveals that injecting a light fluid of density ρb in the recirculating bubble of a bluff body at Re≈6.4×104 has a greater drag reduction potential than blowing fluid of a density greater than or equal to that of the free stream ρ. It is found that the maximum drag reduction scales as (ρb/ρ)-16. This power law combines the ability of the recirculating bubble to diffuse the injected momentum and the effectiveness of the injection to increase the recirculating bubble length.",

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AU - Cadot, O.

AU - Martínez-Bazán, C.

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AB - This study reveals that injecting a light fluid of density ρb in the recirculating bubble of a bluff body at Re≈6.4×104 has a greater drag reduction potential than blowing fluid of a density greater than or equal to that of the free stream ρ. It is found that the maximum drag reduction scales as (ρb/ρ)-16. This power law combines the ability of the recirculating bubble to diffuse the injected momentum and the effectiveness of the injection to increase the recirculating bubble length.

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DO - 10.1103/PhysRevE.102.011101

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Drag reduction of three-dimensional bodies by base blowing with various gas densities

Abstract

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