Leakage-Flow-Induced Vibrations of an Axisymmetric Body : Part 1:Analysis of the Moment Acting on an Axisymmetric Body for Rotational Motion
スポンサーリンク
概要
- 論文の詳細を見る
Using a narrow annular passage between a tapered outer cylinder and a tapered axisymmetric body, we analyzed the moment of the fluid-dynamic forces acting on the body, which vibrates harmonically in the rotational mode.The moments were divided into those of inertia, damping, and stiffness.The following conclusions were obtained by study of these coefficients.When the pivot is situated downstream of the passage inlet, intense dynamic instability due to negative damping and static instability due to negative stiffness occur when the passage is divergent.If the pivot is situated at the passage inlet, the instability does not occur.When the angles of the wall surfaces of the axisymmetric body and outer cylinder to the body axis are varied respectively, the boundary of negative damping is approximately given by the straight line.It was found that negative damping is caused by the effect of steady flow.
- 一般社団法人日本機械学会の論文
- 1998-09-15
著者
-
Arai M
Faculty Of Technology Tokyo University Of Agriculture And Technology
-
Arai Masaaki
Faculty Of Technology Tokyo University Of Agriculture And Technology
-
Tajima Kiyohiro
Department Of Mechanical Engineering Waseda University
関連論文
- Characteristics of the Blade-Passing Frequency Noise of a Centrifugal Fan, and a Method for Noise Reduction
- An Experimental Study on Control Valve Cavitation : 1st Report, Diagnostics of Cavitation Vibration at High Pressure Reduction and at Low Valve Opening
- Vibrations of an Axisymmetric Body in a Cavitating Leakage Flow
- Leakage-Flow-Induced Vibrations of an Axisymmetric Body : Part 1:Analysis of the Moment Acting on an Axisymmetric Body for Rotational Motion
- Leakage-Flow-Induced Vibrations of an Axisymmetric Body : Part2:Theories and Experiments on the Stability of an Axisymmetric Body for One Degree of Freedom of Rotational Motion
- Leakage-Flow-Induced Vibrations of an Axisymmetric Body : Analysis of the Fluid Dynamic Forces Exerted on an Axisymmetric Body