Effect to spacing ratio on flow over repeated two-dimensional square ribs on ground plane

Shiki Okamoto; Kazumi Tsunoda; Tomohide Katsumata; Daichi Suzuki; Nobuaki Abe

doi:10.1299/kikaib.61.2499

Effect to spacing ratio on flow over repeated two-dimensional square ribs on ground plane

Shiki Okamoto, Kazumi Tsunoda, Tomohide Katsumata, Daichi Suzuki, Nobuaki Abe

Research output: Contribution to journal › Article

1 Citation (Scopus)

Abstract

This paper describes a detailed study of the flow structure over repeated two-dimensional square ribs on a ground plane for various values of S/D, and the optimum value of S/D to augment the turbulence intensity near the ground plane. The pitch between the centers of two adjoining square ribs was varied at S/D=2, 3, 5, 7, 9, 11, 13 and 17. The time-mean velocity and turbulence intensity were measured by Laser Doppler Velocimeter. The static pressure was measured by Pitot static tubes. As a result, it is concluded that the pitch ratio S/D=9 is optimum to augment the turbulence intensity in the groove between two adjoining square ribs, when the two-dimensional square ribs are aligned on the wall as a heat transfer promoter.

Original language	English
Pages (from-to)	2499-2505
Number of pages	7
Journal	Transactions of the Japan Society of Mechanical Engineers Series B
Volume	61
Issue number	587
DOIs	https://doi.org/10.1299/kikaib.61.2499
Publication status	Published - 1995 Jan 1

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Keywords

Ground Plane
Heat Transfer Promoter
LDV
Pitch Ratio
Pressure Distribution
Reattachment
Recirculation Region
Square Rib
Turbulence
Turbulent Flow
Velocity Distribution

ASJC Scopus subject areas

Condensed Matter Physics
Mechanical Engineering

Cite this

Okamoto, S., Tsunoda, K., Katsumata, T., Suzuki, D., & Abe, N. (1995). Effect to spacing ratio on flow over repeated two-dimensional square ribs on ground plane. Transactions of the Japan Society of Mechanical Engineers Series B, 61(587), 2499-2505. https://doi.org/10.1299/kikaib.61.2499

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title = "Effect to spacing ratio on flow over repeated two-dimensional square ribs on ground plane",

abstract = "This paper describes a detailed study of the flow structure over repeated two-dimensional square ribs on a ground plane for various values of S/D, and the optimum value of S/D to augment the turbulence intensity near the ground plane. The pitch between the centers of two adjoining square ribs was varied at S/D=2, 3, 5, 7, 9, 11, 13 and 17. The time-mean velocity and turbulence intensity were measured by Laser Doppler Velocimeter. The static pressure was measured by Pitot static tubes. As a result, it is concluded that the pitch ratio S/D=9 is optimum to augment the turbulence intensity in the groove between two adjoining square ribs, when the two-dimensional square ribs are aligned on the wall as a heat transfer promoter.",

keywords = "Ground Plane, Heat Transfer Promoter, LDV, Pitch Ratio, Pressure Distribution, Reattachment, Recirculation Region, Square Rib, Turbulence, Turbulent Flow, Velocity Distribution",

author = "Shiki Okamoto and Kazumi Tsunoda and Tomohide Katsumata and Daichi Suzuki and Nobuaki Abe",

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AU - Okamoto, Shiki

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AU - Suzuki, Daichi

AU - Abe, Nobuaki

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N2 - This paper describes a detailed study of the flow structure over repeated two-dimensional square ribs on a ground plane for various values of S/D, and the optimum value of S/D to augment the turbulence intensity near the ground plane. The pitch between the centers of two adjoining square ribs was varied at S/D=2, 3, 5, 7, 9, 11, 13 and 17. The time-mean velocity and turbulence intensity were measured by Laser Doppler Velocimeter. The static pressure was measured by Pitot static tubes. As a result, it is concluded that the pitch ratio S/D=9 is optimum to augment the turbulence intensity in the groove between two adjoining square ribs, when the two-dimensional square ribs are aligned on the wall as a heat transfer promoter.

AB - This paper describes a detailed study of the flow structure over repeated two-dimensional square ribs on a ground plane for various values of S/D, and the optimum value of S/D to augment the turbulence intensity near the ground plane. The pitch between the centers of two adjoining square ribs was varied at S/D=2, 3, 5, 7, 9, 11, 13 and 17. The time-mean velocity and turbulence intensity were measured by Laser Doppler Velocimeter. The static pressure was measured by Pitot static tubes. As a result, it is concluded that the pitch ratio S/D=9 is optimum to augment the turbulence intensity in the groove between two adjoining square ribs, when the two-dimensional square ribs are aligned on the wall as a heat transfer promoter.

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10.1299/kikaib.61.2499