Lateral equilibrium of asymmetrical swept wings - Aileron control vsgeometric twist

1977 ◽  
Vol 14 (2) ◽  
pp. 122-127 ◽  
Author(s):  
Terrence A. Weisshaar
Keyword(s):  
Lateral Equilibrium ◽  
Swept Wings

Appraisal of numerical methods in predicting the aerodynamics of forward-swept wings

1996 ◽  
Author(s):  
G. Lombardi ◽  
M. Salvetti ◽  
M. Morelli
Keyword(s):  
Numerical Methods ◽  
Swept Wings

Correction: Changes in Modern Lifting-Line Methods for Swept Wings and Viscous Effects

2018 ◽  
Author(s):  
Jose Rodolfo Chreim ◽  
Marcos Pimenta ◽  
Joao Lucas D. Dantas ◽  
Gustavo Assi
Keyword(s):  
Viscous Effects ◽  
Lifting Line ◽  
Swept Wings

Geometrically exact, intrinsic mixed variational formulation for smart, slender multilink composite structures

2021 ◽  
pp. 1045389X2110322
Author(s):  
P M G Bashir Asdaque ◽  
Sitikantha Roy
Keyword(s):  
Composite Structures ◽  
Turbine Blades ◽  
Space Structures ◽  
Wind Turbine Blades ◽  
Weak Formulation ◽  
Helicopter Blades ◽  
Static Mechanical ◽  
Computational Platform ◽  
Swept Wings ◽  
Variational Statement

Flexible links are often part of massive aerospace structures like helicopter or wind turbine blades, satellite bae, airplane wings, and space stations. In the present work, a mixed variational statement based on intrinsic variables is derived for multilinked smart slender structures. Equations involved in the derivation do not involve approximations of kinematical variables to describe the deformation of the reference line or the rotation of the deformed cross-section of the slender links resulting in a geometrically exact formulation. Finite element equations are derived from weak formulation, which can analyze large geometrically non-linear problems. The weakest possible variational statement provides greater flexibility in the choice of shape functions, therefore reducing the associated numerical complexities. The present work focuses on developing a single integrated computational platform which can study multibody, multilink, lightweight composite, structural system built with both embedded actuations, sensing, as well as passive links. Validation of static mechanical and electrical outputs from 3D FE simulation and literature proves the efficacy of the computational platform. Dynamic results will be communicated in future correspondence. The computational platform developed here can be applied for monitoring and active control applications of flexible smart multilink structures like swept wings, multi-bae space structures, and helicopter blades.

scholarly journals Transonic buffet instability: From two-dimensional airfoils to three-dimensional swept wings

2019 ◽  
Vol 4 (10) ◽  
Author(s):  
Edorado Paladini ◽  
Samir Beneddine ◽  
Julien Dandois ◽  
Denis Sipp ◽  
Jean-Christophe Robinet
Keyword(s):  
Three Dimensional ◽  
Two Dimensional ◽  
Swept Wings ◽  
Transonic Buffet

Control of Vortex Breakdown over Highly Swept Wings

AIAA Journal ◽  
2005 ◽  
Vol 43 (9) ◽  
pp. 2065-2069 ◽  
Author(s):  
Ephraim J. Gutmark ◽  
Stephen A. Guillot
Keyword(s):  
Vortex Breakdown ◽  
Swept Wings

Wind tunnel investigation of the transonic aerodynamic characteristics of forward swept wings

1983 ◽  
Vol 20 (3) ◽  
pp. 195-202 ◽  
Author(s):  
G. C. Uhuad ◽  
T. M. Weeks ◽  
R. Large
Keyword(s):  
Wind Tunnel ◽  
Aerodynamic Characteristics ◽  
Swept Wings

Lifting-line theory of swept wings based on the full potential theory

1981 ◽  
Vol 32 (5) ◽  
pp. 481-496 ◽  
Author(s):  
H. K. Cheng ◽  
Reuben Chow ◽  
Robert E. Melnik
Keyword(s):  
Potential Theory ◽  
Full Potential ◽  
Line Theory ◽  
Lifting Line ◽  
Swept Wings ◽  
Lifting Line Theory

Lateral Equilibrium Position Analysis Program With Applications to Electric Submersible Pumps

2017 ◽  
Author(s):  
Clay S. Norrbin ◽  
Dara W. Childs
Keyword(s):  
Equilibrium Position ◽  
Static Equilibrium ◽  
Analysis Program ◽  
Eccentricity Ratio ◽  
Vertical Orientation ◽  
Maximum Curvature ◽  
First Finding ◽  
Static Eccentricity ◽  
Lateral Equilibrium ◽  
Vertical Case

The long length of sub-sea Electric Submersible Pumps (ESPs) requires a large amount of annular seals. Loading caused by gravity and housing curvature changes the Static Equilibrium Position (SEP) of the rotor in these seals. This analysis predicts the SEP due to gravity and/or well curvature loading. The analysis also interfaces displays the rotordynamics around the SEP. A static and rotordynamic analysis is presented for a previously studied ESP model. This study differs by first finding the SEP and then performing a rotordynamic analysis about the SEP. Predictions are shown in a horizontal and a vertical orientation. In these two configurations, viscosities and clearances are varied through 4 cases: 1X 1cP, 3X 1cP, 1X 30cP, and 3X 30cP. In a horizontal, straight-housing position, the model includes gravity and buoyancy on the shaft. At 1cP-1X and 1cP-3X, the horizontal statics show a moderate eccentricity ratio for the shaft with respect to the housing. With 30cP-1X, the predicted static eccentricity ratio is low at 0.08. With 30cP-3X, the predicted eccentricity ratio increases to 0.33. Predictions for a vertical case of the same model are also presented. The curvature of the housing is varied in the Y-Z plane until rub or close-to-wall rub is expected. The curvature needed for a rub with a 1X 1cP fluid is 7.5 degrees of curvature. Curvature has little impact on stability. With both 1X 30cP and 3X 30cP, the maximum curvature for a static rub are over 25 degrees of curvature. Both 1X 30cP and 3X 30cP remain unstable with increasing curvature.

Experimental and computational study of transonic flow about swept wings

1980 ◽  
Author(s):  
A. BERTELRUD ◽  
M. BERGMANN ◽  
T. COAKLEY
Keyword(s):  
Transonic Flow ◽  
Computational Study ◽  
Swept Wings
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