Calculation of nonlinear aerodynamic characteristics of wing of complex planform allowing for nose vortex sheet

1977 ◽  
Vol 12 (2) ◽  
pp. 253-256 ◽  
Author(s):  
V. A. Aparinov
Keyword(s):  
Vortex Sheet ◽  
Aerodynamic Characteristics ◽  
Complex Planform ◽  
Nonlinear Aerodynamic

scholarly journals Dipole Approximation in the Calculation of the Perturbed Velocities

2014 ◽  
Vol 15 (4) ◽  
pp. 308-314
Author(s):  
Oleg Solovyov ◽  
Sergey Yeryomenko ◽  
Vitaliy Kobrin ◽  
Yuriy Vorobyov
Keyword(s):  
Mutual Influence ◽  
Accuracy Assessment ◽  
Vortex Method ◽  
Vortex Sheet ◽  
Aerodynamic Characteristics ◽  
Dipole Approximation ◽  
Algebraic Equations ◽  
Discrete Vortex ◽  
Linear Algebraic Equations ◽  
Hardware Costs

Abstract In this article we consider one of the approaches aimed at reducing time of calculation of aerodynamic characteristics of the studied objects using discrete vortex method. Also, accuracy assessment of calculation of aerodynamic characteristics was performed. Analysis of the obtained dependences allows us to make a conclusion that the considered approach to the calculation of the functions of the mutual influence on the stages of formation of the system of linear algebraic equations, position of vortex sheet nodes as well as aerodynamic loads reduces hardware costs about three times, with a relative error of less than 4%.

Vortex Breakdown Effects on the Low-speed Aerodynamic Characteristics of Slender Delta Wings in Symmetrical Flow

1967 ◽  
Vol 71 (676) ◽  
pp. 319-322 ◽  
Author(s):  
D. Hummel ◽  
P. S. Srinivasan
Keyword(s):  
Vortex Breakdown ◽  
Vortex Formation ◽  
Vortex Sheet ◽  
Aerodynamic Characteristics ◽  
Flow Visualisation ◽  
Delta Wings ◽  
Vortex Sheets ◽  
The Core ◽  
Leading Edges ◽  
Slender Wing

Even at small angles of incidence, the flow separates from the sharp leading edges of a slender wing. These flow separations usually lead to the formation of two free vortex layers, joined to the leading edges of the wing and rolling up to form spiral-shaped vortex sheets above the upper surface of the wing. This vortex formation is illustrated schematically in Fig. 1. The streamlines on the vortex sheet follow helical paths. Smoke injected near the wing apex for flow visualisation remains concentrated close to the axis of the core of the vortex sheet.

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