Drag Calculations of Unappended Bodies of Revolution.

1998 ◽  
Author(s):  
Joseph J. Gorski
Keyword(s):  
Bodies Of Revolution

Unconditionally stable Laguerre-based BOR-FDTD scheme for scattering from bodies of revolution

2007 ◽  
Vol 49 (8) ◽  
pp. 1897-1900 ◽  
Author(s):  
Hai-Lin Chen ◽  
Bin Chen ◽  
Yan-Tao Duan ◽  
Yun Yi ◽  
Da-Gang Fang
Keyword(s):  
Bodies Of Revolution ◽  
Unconditionally Stable

scholarly journals Optical Inspection Systems for Axisymmetric Parts with Spatial 2D Resolution

Symmetry ◽  
2021 ◽  
Vol 13 (7) ◽  
pp. 1218
Author(s):  
Aleksandr Kulchitskiy
Keyword(s):  
Control System ◽  
Optical System ◽  
Measurement Accuracy ◽  
Experimental Studies ◽  
Digital Camera ◽  
Digital Cameras ◽  
Bodies Of Revolution ◽  
Optical Inspection ◽  
Inspection Systems ◽  
Projection Error

The article proposes a solution to the problem of increasing the accuracy of determining the main shaping dimensions of axisymmetric parts through a control system that implements the optical method of spatial resolution. The influence of the projection error of a passive optical system for controlling the geometric parameters of bodies of revolution from the image of its sections, obtained by a digital camera with non-telecentric optics, on the measurement accuracy is shown. Analytical dependencies are derived that describe the features of the transmission of measuring information of a system with non-telecentric optics in order to estimate the projection error. On the basis of the obtained dependences, a method for compensating the projection error of the systems for controlling the geometry of the main shaping surfaces of bodies of revolution has been developed, which makes it possible to increase the accuracy of determining dimensions when using digital cameras with a resolution of 5 megapixels or more, equipped with short-focus lenses. The possibility of implementing the proposed technique is confirmed by the results of experimental studies.

On the anisotropic response of a Janus drop in a shearing viscous fluid

2015 ◽  
Vol 770 ◽  
Author(s):  
Misael Díaz-Maldonado ◽  
Ubaldo M. Córdova-Figueroa
Keyword(s):  
Shear Flow ◽  
Velocity Gradient ◽  
External Flow ◽  
Bodies Of Revolution ◽  
Internal Interface ◽  
Equal Radius ◽  
Fluid Drop ◽  
Resistance Matrix ◽  
Shearing Motion ◽  
Unbounded Fluid

The force and couple that result from the shearing motion of a viscous, unbounded fluid on a Janus drop are the subjects of this investigation. A pair of immiscible, viscous fluids comprise the Janus drop and render it with a ‘perfect’ shape: spherical with a flat, internal interface, in which each constituent fluid is bounded by a hemispherical domain of equal radius. The effect of the arrangement of the internal interface (drop orientation) relative to the unidirectional shear flow is explored within the Stokes regime. Projection of the external flow into a reference frame centred on the drop simplifies the analysis to three cases: (i) a shear flow with a velocity gradient parallel to the internal interface, (ii) a hyperbolic flow, and (iii) two shear flows with a velocity gradient normal to the internal interface. Depending on the viscosity of the internal fluids, the Janus drop behaves as a simple fluid drop or as a solid body with broken fore and aft symmetry. The resultant couple arises from both the straining and swirling motions of the external flow in analogy with bodies of revolution. Owing to the anisotropic resistance of the Janus drop, it is inferred that the drop can migrate lateral to the streamlines of the undisturbed shear flow. The grand resistance matrix and Bretherton constant are reported for a Janus drop with similar internal viscosities.

Importance of the near wake in drag prediction of bodies of revolution

AIAA Journal ◽  
1976 ◽  
Vol 14 (8) ◽  
pp. 1132-1133 ◽  
Author(s):  
V. C. Patel ◽  
O. Guven
Keyword(s):  
Near Wake ◽  
Bodies Of Revolution ◽  
Drag Prediction

Aerodynamic Characteristics of Bodies of Revolution at Near-Sonic Speeds

2007 ◽  
Vol 44 (6) ◽  
pp. 1815-1841 ◽  
Author(s):  
Brenda M. Kulfan ◽  
John E. Bussoletti ◽  
Craig L. Hilmes
Keyword(s):  
Aerodynamic Characteristics ◽  
Bodies Of Revolution
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