A novel method of evaluating the lift force on the bluff body based on Noca's flux equation

doi:10.1088/1674-1056/24/8/084701

中国物理B ›› 2015, Vol. 24 ›› Issue (8): 84701-084701.doi: 10.1088/1674-1056/24/8/084701

• ELECTROMAGNETISM, OPTICS, ACOUSTICS, HEAT TRANSFER, CLASSICAL MECHANICS, AND FLUID DYNAMICS • 上一篇下一篇

A novel method of evaluating the lift force on the bluff body based on Noca's flux equation

隋相坤^a, 姜楠^{a b c}

a State Key Laboratory of Nonlinear Mechanics, Institute of Mechanics, Chinese Academy of Sciences, Beijing 100190, China;
b Department of Mechanics, School of Mechanical Engineering, Tianjin University, Tianjin 300072, China;
c Tianjin Key Laboratory of Modern Engineering Mechanics, Tianjin 300072, China

收稿日期:2014-11-10 修回日期:2015-01-30 出版日期:2015-08-05 发布日期:2015-08-05

A novel method of evaluating the lift force on the bluff body based on Noca's flux equation

Sui Xiang-Kun (隋相坤)^a, Jiang Nan (姜楠)^{a b c}

a State Key Laboratory of Nonlinear Mechanics, Institute of Mechanics, Chinese Academy of Sciences, Beijing 100190, China;
b Department of Mechanics, School of Mechanical Engineering, Tianjin University, Tianjin 300072, China;
c Tianjin Key Laboratory of Modern Engineering Mechanics, Tianjin 300072, China

Received:2014-11-10 Revised:2015-01-30 Online:2015-08-05 Published:2015-08-05
Contact: Sui Xiang-Kun E-mail:xksui@lnm.imech.ac.cn

摘要/Abstract

摘要： The influence of experimental error on lift force evaluated by Noca's flux equation is studied based on adding errors into the direct numerical simulation data for flow past cylinder at Re=100. As Noca suggested using the low-pass filter to get rid of the high-frequency noise in the evaluated lift force, we verify that his method is inapplicable for dealing with the dataset of 1% experimental error, although the precision is acceptable in practice. To overcome this defect, a novel method is proposed in this paper. The average of the lift forces calculated by using multiple control volume is taken as the evaluation before applying the low-pass filter. The method is applied to an experimental data for flow past a cylinder at approximately Re=900 to verify its validation. The results show that it improves much better on evaluating the lift forces.

关键词: flux equation, lift force, experimental error

Abstract: The influence of experimental error on lift force evaluated by Noca's flux equation is studied based on adding errors into the direct numerical simulation data for flow past cylinder at Re=100. As Noca suggested using the low-pass filter to get rid of the high-frequency noise in the evaluated lift force, we verify that his method is inapplicable for dealing with the dataset of 1% experimental error, although the precision is acceptable in practice. To overcome this defect, a novel method is proposed in this paper. The average of the lift forces calculated by using multiple control volume is taken as the evaluation before applying the low-pass filter. The method is applied to an experimental data for flow past a cylinder at approximately Re=900 to verify its validation. The results show that it improves much better on evaluating the lift forces.

Key words: flux equation, lift force, experimental error

中图分类号: (Vortex dynamics)

47.32.C-

隋相坤, 姜楠. A novel method of evaluating the lift force on the bluff body based on Noca's flux equation[J]. 中国物理B, 2015, 24(8): 84701-084701.

Sui Xiang-Kun (隋相坤), Jiang Nan (姜楠). A novel method of evaluating the lift force on the bluff body based on Noca's flux equation[J]. Chin. Phys. B, 2015, 24(8): 84701-084701.

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A novel method of evaluating the lift force on the bluff body based on Noca's flux equation

A novel method of evaluating the lift force on the bluff body based on Noca's flux equation

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