中心間隔比３および４のタンデム配置正方形角柱周辺の気流測定

長谷部 寛; 名取 信彦; 原嶋 崇太; 城石 健治; 芹澤 裕; 野村 卓史

doi:10.14887/kazekosymp.21.0.251.0

PROCEEDINGS OF THE 21st NATIONAL SYMPOSIUM ON WIND ENGINEERING

Session ID : 43

DOI https://doi.org/10.14887/kazekosymp.21.0.251.0

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Co-host: Japanese Society of Steel Construction, Japanese Society of Civil Engineers, Meteorological Society of Japan, Architectural Institute of Japan, Japan Association for Wind Engineering, The Institute of Electrical Engineers of Japan

MEASUREMENTS OF THE VELOCITY FIELD AROUND TANDEM-ARRANGED SQUARE CYLINDERS OF THE SPACING RATIOS 3 AND 4

*HIROSHI HASEBE, NOBUHIKO NATORI, TAKAMOTO HARASHIMA, KENJI SHIROISHI, YU SERIZAWA, TAKASHI NOMURA

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Keywords: Square cylinder, Tandem arrangement, Phase average, Split fiber probe

CONFERENCE PROCEEDINGS FREE ACCESS

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Abstract

Velocity fields around two square cylinders in a tandem arrangement are measured by means of split fiber probe. For the spacing ratio L/D = 3, the separated shear layer from the upstream cylinder attaches to the downstream cylinder and does not go through between the two cylinders. On the other hands, for the spacing ratio L/D = 4, the separated shear layer from the upstream cylinder forms recirculation region behind the upstream cylinder. As a result, a diagonal flow which intersects between the two cylinders and a high curvature flow which changes the flow direction in the region between the two cylinders are formed.

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