Unsteady Lift and Drag Forces Acting on the Elliptic Cylinder

Moon-Sang Kim; Young-Bin Park

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Unsteady Lift and Drag Forces Acting on the Elliptic Cylinder

机译：作用在椭圆圆柱体上的不稳定升力和阻力

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A parametric study has been accomplished to figure out the effects of elliptic cylinder thickness, angle of attack, and Reynolds number on the unsteady lift and drag forces exerted on the elliptic cylinder. A two-dimensional incompressible Navier-Stokes flow solver is developed based on the SIMPLER method in the body-intrinsic coordinates system to analyze the unsteady viscous flow over elliptic cylinder. Thickness-to-chord ratios of 0.2, 0.4, and 0..6 elliptic cylinders are simulated at different Reynolds numbers of 400 and 600, and angles of attack of 10°, 20°, and 30°. Through this study, it is observed that the elliptic cylinder thickness, angle of attack, and Reynolds number are very important parameters to decide the lift and drag forces. All these parameters also affect significantly the frequencies of the unsteady force oscillations.

机译：已经完成了一项参数研究，以弄清楚椭圆圆柱体的厚度，迎角和雷诺数对施加在椭圆圆柱体上的不稳定升力和阻力的影响。基于SIMPLER方法，在本征坐标系统中开发了二维不可压缩的Navier-Stokes流动求解器，以分析椭圆圆柱上的非恒定粘性流动。在400和600的不同雷诺数以及10°，20°和30°的迎角下，模拟了0.2、0.4和0..6椭圆圆柱的厚度与弦比。通过这项研究，可以观察到椭圆圆柱体的厚度，迎角和雷诺数是决定升力和阻力的非常重要的参数。所有这些参数还显着影响非定常力振荡的频率。

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《Journal of Mechanical Science and Technology》 |2006年第1期|共9页
作者
Moon-Sang Kim; Young-Bin Park;
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正文语种 eng
中图分类机械学（机械设计基础理论）;
关键词
Unsteady Force; SIMPLER Method; Elliptic Cylinder; Navier-Stokes Equations Incompressible Viscous Flow; Angle of Attack;

机译：非定常力;SIMPLER方法;椭圆圆柱;Navier-Stokes方程;不可压缩粘性流;攻角;

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专利

1. Unsteady Lift and Drag Forces Acting on the Elliptic Cylinder [J] . Moon-Sang Kim, Young-Bin Park Journal of Mechanical Science and Technology . 2006,第1期

机译：作用在椭圆圆柱体上的不稳定升力和阻力
2. Unsteady Characteristics of Lift and Drag Acting on a Pitching Airfoil [J] . Masaki FUCHIWAKI, Kazuhiro TANAKA, Hiroki TANAKA 日本機械学会論文集. B編 . 1999,第634期

机译：俯仰翼型上的升力和阻力的非定常特性
3. Modeling the unsteady lift and drag on a finite-length circular cylinder in cross-flow [J] . D. E. Capone, G. C. Lauchle Journal of Fluids and Structures . 2000,第6期

机译：横流中有限长圆柱体上的非稳态升力和阻力建模
4. Drag and Lift Acting on a Circular Cylinder in Laminar Boundary Layer Part 1: Verification of Force Transducer for Measuring Small Force [C] . Kiyoshi Hatakenaka, Kazuhiro Tanaka, Masaki Fuchiwaki, Fluids Engineering Conference . 2003

机译：层边界层上的圆柱体上的拖放作用第1部分：用于测量小力的力传感器的验证
5. An investigation of the effect of a varying boundary layer on the lift and drag coefficients of a circular cylinder next to a solid boundary. [D] . Chavez, Manuel. 1969

机译：研究边界层变化对紧邻实心边界的圆柱体的升力和阻力系数的影响。
6. Unsteady Motion Finite Reynolds Numbers and Wall Effect on Vorticella convallaria Contribute Contraction Force Greater than the Stokes Drag [O] . Sangjin Ryu, Paul Matsudaira 2010

机译：非定常运动有限雷诺数以及对室壁铃虫的壁效应导致收缩力大于斯托克斯阻力
7. Measurements of the pressure distributions on two circular cylinders of diameter d, vertically immersed in a turbulent boundary layer, are performed for various cylinder spacings s and angles of attack φ. The characteristics of the drag and lift forces acting on the cylinder are classified into three regions : i.e., 1) 0°＜__〜φ＜__〜30°, 2) 30°＜__〜φ＜__〜120°and 3) 120°＜__〜φ＜__〜180°which are divided by the two zero-lift force lines. Moreover, it is found that the interference between two cylinders is almost negligible for s/d＞__〜4, except for the influence of the wake region of the upstream cylinder. [O] . 谷口清一, 坂本弘志, Seiichi TANIGUCHI, 1980

机译：对于不同的气缸间距s和迎角φ，对垂直浸入湍流边界层的直径为d的两个圆柱上的压力分布进行测量。作用在气缸上的阻力和提升力的特性分为三个区域：1）0°＜__ 〜φ ＜__ 〜30°，2）30°＜__ 〜φ ＜__ 〜120°和3） 120°＜__ 〜φ ＜__ 〜180°除以两条零升力线。而且，发现除了上游气缸的尾流区域的影响之外，对于s / d＞ __〜4，两个气缸之间的干扰几乎可以忽略。
8. EFFECT OF COMPRESSIBILITY AT HIGH SUBSONIC VELOCITIES ON THE LIFTING FORCE ACTING ON AN ELLIPTIC CYLINDER [R] . Carl Kaplan 1946

机译：高次旋转速度下的可压缩性对椭圆柱升力作用的影响

Unsteady Lift and Drag Forces Acting on the Elliptic Cylinder

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