Results 31 to 40 of about 101,417 (300)
Measurements of the Flow in Backshroud/Casing Clearance of Precessing Centrifugal Impeller
International Journal of Rotating Machinery, 1997 Detailed flow measurements have been made to clarify the unsteady flow in the backshroud/ casing clearance of a precessing centrifugal impeller. The unsteady pressure was integrated to obtain the fluid force moment on the precessing impeller shroud for ...
Yoshiki Yoshida +4 more
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Nihon Kikai Gakkai ronbunshu, 2018 This paper presents experiments and an analysis of the self-excited vibration of a plate supported by air pressure. In the analysis, the unsteady fluid force acting on the plate is calculated based on the basic equation of a two-dimensional gap flow ...
Masakazu TAKEDA, Masahiro WATANABE
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Nihon Kikai Gakkai ronbunshu, 2016 This paper presents a three-dimensional flutter analysis of a rectangular sheet in an axial fluid flow. The unsteady fluid force acting on the sheet surface is calculated using Doublet-point method based on the unsteady lifting surface theory.
Masahiro WATANABE +4 more
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Numerical analysis of unsteady forces in a pump-jet propulsor due to dynamic tip-clearance changes
Zhongguo Jianchuan YanjiuObjectiveThis study aims to investigate the effects of dynamic variations in rotor tip-clearance on the unsteady forces of a pump-jet propulsor, while analyzing the role of a flexible isolation system in influencing the excitation characteristics of the ...
Huiyao LI +5 more
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Dynamic stability and exciting mechanism of a plate supported by air pressure
Nihon Kikai Gakkai ronbunshu, 2016 This paper presents experiments and an analysis on the self-excited vibration of a plate supported by air pressure. The instability conditions are examined using a theoretical analysis considering the effect air compressibility in a chamber.
Masakazu TAKEDA, Masahiro WATANABE
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Estimation of unsteady aerodynamic forces using pointwise velocity data
, 2016 A novel method to estimate unsteady aerodynamic force coefficients from pointwise velocity measurements is presented. The methodology is based on a resolvent-based reduced-order model which requires the mean flow to obtain physical flow structures and ...
Blackburn, H. M. +2 more
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Unsteady cfd analysis of erosion mechanism in the coolant channels of a rotating gas turbine blade [PDF]
, 2015 The two-phase flow in a rotating wedge mimicking the final portion of a blade turbine internal cooling channel is here presented and discussed focusing on unsteady motion and erosion mechanisms.
Anielli, Davide +4 more
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Unsteady Force Measurements in Pitching-Plunging Airfoils [PDF]
39th AIAA Fluid Dynamics Conference, 2009 A new sensor for unsteady force measurements of pitching and plunging airfoils using Fiber Bragg Gratings (FBG) in a water channel facility has been the developed. Load cells having four or five FBG sensors written in a single optical fiber have been developed to measure the strain at flexures designed and determine the normal and axial forces, the ...
Bernal, Luis P. +3 more
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Stereo PIV measurements of vortex behavior produced by a pitch-oscillating discoid airfoil
Journal of Fluid Science and Technology, 2014 Flying animals and insects flap their wings using a combination of pitching and heaving oscillations. Unsteady fluid forces presumably play an important role in the flight mechanism, and also in the propulsive force of swimmers performing the front crawl.
Toshihiro HANIU, Hiroaki HASEGAWA
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An Unsteady Momentum Source Method and Its Application in Simulation of Hovering Rotor
Xibei Gongye Daxue Xuebao, 2020 The efficiency and accuracy of numerical simulation on power unit is the key to study the relevant aerodynamic layout with multiple rotating power units. However, the numerical simulation of the power unit using real geometry all faces the problem of low
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