Results 11 to 20 of about 9,800,925 (164)
Design and analysis of propeller blade geometry using the PDE method [PDF]
, 1993 This thesis aims to incorporate geometric and functional design of surfaces using a method known as the PDE method. In particular, it will be demonstrated how the PDE method can be extended to represent an existing marine propeller geometry ...
Dekanski, Christopher Wojciech
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Numerical study of the unsteady aerodynamics of helicopter rotor aerofoils
, 1999 A two-dimensional model of the aerodynamics of rotor blades in forward flight is proposed in which the motion of the blade is represented by periodical variations of the freestrearn velocity and incidence. A novel implicit methodology for the solution
Shaw, Scott
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Unsteady Lifting Surface Theory for a Rotating Transonic Cascade of Swept Blades [PDF]
Volume 5: Manufacturing Materials and Metallurgy; Ceramics; Structures and Dynamics; Controls, Diagnostics and Instrumentation; Education; IGTI Scholar Award; General, 1991 A lifting surface theory is developed to predict the unsteady three-dimensional aerodynamic characteristics for a rotating transonic annular cascade of swept blades. An improved method is used to solve the integral equation for the unsteady blade loading.
Hidekazu Kodama, Masanobu Namba
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Theory and computations for breakup of unsteady subsonic or supersonic separating flows [PDF]
, 1994 This study of flow just beyond a breakaway-separation point presents a description of planar nonlinear unsteady effects over a fairly wide parameter range, for a subsonic or supersonic boundary layer at large Reynolds numbers.
Vickers, IP +3 more
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Unsteady Lifting Surface Theory for Supersonic Through-Flow Fan
TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series B, 1992 The purpose of the present study is to predict analytically the unsteady loading on vibrating blades of a supersonic through-flow fan and investigate the aerodynamic instability. It is assumed that each blade operates with zero steady loading, and vibrates with small displacement amplitude, and a linearized unsteady lifting surface theory for a ...
Namba, Masanobu, Hanada, Toshiya
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Lifting wavelet algorithm for freeform surface filtering using a Gaussian prediction operator [PDF]
, 2013 The aim of the paper is to investigate a novel lifting wavelet algorithm based on a Gaussian prediction operator to filter freeform surfaces represented by 3D triangular meshes.
Abdul-Rahman, Hussein S. +2 more
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An Unsteady Lifting Surface Theory for Ducted Fan Blades [PDF]
Journal of Turbomachinery, 1991 A frequency domain lifting surface theory is developed to predict the unsteady aerodynamic pressure loads on oscillating blades of a ducted subsonic fan. The steady baseline flow as observed in the rotating frame of reference is the helical flow dictated by the forward flight speed and the rotational speed of the fan.
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The onset of instability in unsteady boundary-layer separation [PDF]
, 1996 The process of unsteady two-dimensional boundary-layer separation at high Reynolds number is considered. Solutions of the unsteady non-interactive boundary-layer equations are known to develop a generic separation singularity in regions where the ...
K. W. Cassel +5 more
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Unsteady effects during resistance tests on a ship model in a towing tank [PDF]
, 2008 It is known that there are oscillations in the wave resistance during the constantvelocity phase of a towing-tank resistance test on a ship model. In this work, the unsteady thin-ship resistance theory has been applied to this case. The results have been
Day, Alexander +3 more
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Unsteady flow induced by a withdrawal point beneath a free surface [PDF]
, 2005 The unsteady axisymmetric withdrawal from a fluid with a free surface through a point sink is considered. Results both with and without surface tension are included and placed in context with previous work.
Forbes, L.K. +7 more
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