3-D NUMERICAL SIMULATION OF FLOW AROUND A RECTANGULAR CYLINDER
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- Enya Atsushi
- 三菱重工業名古屋研究所
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- Okajima Atsushi
- 金沢大学工学部機能機械工学科
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- Kiwata Takahiro
- 金沢大学工学部機能機械工学科
Bibliographic Information
- Other Title
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- 矩形柱周りの流力特性に関する数値シミュレーション
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Abstract
The appearance of a temporal irregularity of aerodynamic force of a rectangular cylinder with the critical depth (D/H=0.6), seems to be such startling phenomenon that is well worth investigating further. In this paper, turbulent flow around a stationary rectangular cylinder with the side ratio D/H of 0.2 to 1.0, has been computed by the LES method at high Reynolds number of 2.2×104. The main objectives of this work are to predict and evaluate characteristics of flows for a stationary cylinder. The computational results of force coefficients such as mean and fluctuating values of drag and lift forces, Strouhal number and flow-configurations correspond well with experimental data. We confirm that the abrupt changes of the aerodynamic force appear irregularly with the time for the cylinder with a critical section. The temporal variation of a drag force between low and high values is certified to be accompanied with the corresponding change of instantenious frequency of lift force, by using of a wavelet transform method and an analysis of frequency histogram. The time history of drag force CD agrees well with variation of the intensity of the wavelet transform coefficients or Strauhal number from the wavelet analysis results of lift force CL.
Journal
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- PROCEEDINGS OF NATIONAL SYMPOSIUM ON WIND ENGINEERING
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PROCEEDINGS OF NATIONAL SYMPOSIUM ON WIND ENGINEERING Symp17 (0), 37-37, 2002
Japan Association for Wind Engineering
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Details 詳細情報について
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- CRID
- 1390282680568689024
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- NII Article ID
- 130006960990
- 80015790717
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- NII Book ID
- AN00349656
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- Data Source
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- JaLC
- CiNii Articles
- KAKEN
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- Abstract License Flag
- Disallowed