TY - JOUR
T1 - Effect to spacing ratio on flow over repeated two-dimensional square ribs on ground plane
AU - Okamoto, Shiki
AU - Tsunoda, Kazumi
AU - Katsumata, Tomohide
AU - Suzuki, Daichi
AU - Abe, Nobuaki
N1 - Copyright:
Copyright 2016 Elsevier B.V., All rights reserved.
PY - 1995
Y1 - 1995
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.
KW - Ground Plane
KW - Heat Transfer Promoter
KW - LDV
KW - Pitch Ratio
KW - Pressure Distribution
KW - Reattachment
KW - Recirculation Region
KW - Square Rib
KW - Turbulence
KW - Turbulent Flow
KW - Velocity Distribution
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U2 - 10.1299/kikaib.61.2499
DO - 10.1299/kikaib.61.2499
M3 - Article
AN - SCOPUS:0029336035
VL - 61
SP - 2499
EP - 2505
JO - Nihon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B
JF - Nihon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B
SN - 0387-5016
IS - 587
ER -