Unsteady fluid-dynamic force solely in terms of control-surface integral

2005 ◽  
Vol 17 (9) ◽  
pp. 098102 ◽  
Author(s):  
Jie-Zhi Wu ◽  
Ze-Liang Pan ◽  
Xi-Yun Lu
Keyword(s):  
Fluid Dynamic ◽  
Control Surface ◽  
Dynamic Force ◽  
Surface Integral ◽  
Unsteady Fluid

scholarly journals Study on Criterion of Acoustic Resonant Vibration with Unsteady Fluid Dynamic Force.

1999 ◽  
Vol 42 (3) ◽  
pp. 377-383
Author(s):  
Hiroki TANAKA ◽  
Kazuhiro TANAKA ◽  
Fumio SHIMIZU ◽  
Tohru IIJIMA
Keyword(s):  
Fluid Dynamic ◽  
Dynamic Force ◽  
Resonant Vibration ◽  
Unsteady Fluid

Reexamination of Unsteady Fluid Dynamic Forces on a Two-Dimensional Finite Plate at Small Mach Numbers

1980 ◽  
Vol 47 (4) ◽  
pp. 720-724 ◽  
Author(s):  
Y. Matsuzaki ◽  
T. Ueda
Keyword(s):  
Incompressible Flows ◽  
Fluid Dynamic ◽  
Control Surface ◽  
Analytical Determination ◽  
Natural Mode ◽  
Two Dimensional ◽  
Mach Numbers ◽  
Unsteady Fluid ◽  
The Fourier Transform

The Fourier transform theory is applied to the analytical determination of the disturbance velocity potential and pressure acting on a two-dimensional plate, in order to reexamine those of previous analyses by other investigators. Simplified expressions of the generalized forces are presented for incompressible and nearly incompressible flows. As the Mach number tends to zero, the virtual mass induced by an oscillating fluid becomes infinitely large for a natural mode symmetric with respect to the midchord point. It is recommended to take into account a symmetric mode which changes no fluid volume contained in a control surface, when a coupled flutter oscillation at very low Mach numbers is analyzed. Incorrectness in the generalized forces of the previous analyses is pointed out by comparing with the present analysis.

scholarly journals Study on Criterion of Acoustic Resonant Vibration with Unsteady Fluid Dynamic Force.

1998 ◽  
Vol 64 (626) ◽  
pp. 3293-3298 ◽  
Author(s):  
Hiroki TANAKA ◽  
Kazuhiro TANAKA ◽  
Fumio SHIMIZU ◽  
Tohru IIJIMA
Keyword(s):  
Fluid Dynamic ◽  
Dynamic Force ◽  
Resonant Vibration ◽  
Unsteady Fluid

Fluid-Dynamic Force Characteristics of an Auto Rotating Flat Plate

2007 ◽  
Author(s):  
Takahiro Yasuda
Keyword(s):  
Flat Plate ◽  
Vortex Shedding ◽  
Fluid Dynamic ◽  
Vortex Method ◽  
Dynamic Force ◽  
Discrete Vortex ◽  
Dynamic Forces ◽  
Plate Rotation ◽  
Unsteady Fluid ◽  
Force Characteristics

When a thin flat pate is released in still air, the plate automatically sets into a rotational motion. This phenomenon is called autorotation. The autorotating flat plate is loaded by unsteady fluid-dynamic forces. It is guessed that the forces are contributed by one due to vortex shedding from the edges of the plate and one due to the plate rotation, but the detail force characteristics have not been clear yet. In this study, we calculated the two types of flow by the discrete vortex method, one is flow around a rotating flat plate hinged about its center at constant rotating frequency in the uniform flow and the other is flow around a freely falling flat plate. The computed result in both types of flow agree well with the experiment. In the case of freely falling plate, autorotation phenomena could be predicted. By computed fluid dynamic forces, the contributions of vortex shedding from the plate to fluid dynamic forces and feedback effect of the fluid dynamic forces were found.

Direct Measurement of Unsteady Fluid Dynamic Forces for a Hovering Dragonfly

AIAA Journal ◽  
2005 ◽  
Vol 43 (12) ◽  
pp. 2475-2480 ◽  
Author(s):  
Manabu Yamamoto ◽  
Koji Isogai
Keyword(s):  
Direct Measurement ◽  
Fluid Dynamic ◽  
Dynamic Forces ◽  
Unsteady Fluid

Vortical Fluid-Dynamic Force and Moment

2015 ◽  
pp. 283-323
Author(s):  
Jie-Zhi Wu ◽  
Hui-Yang Ma ◽  
Ming-De Zhou
Keyword(s):  
Fluid Dynamic ◽  
Dynamic Force
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