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Maximum Vortex-Induced Side Force
J. Peter Reding,Lars E. Ericsson +1 more
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In this paper, a method of determining the maximum vortex-induced side force on slender bodies at high angle of attack and zero sideslip is presented, where the maximum stationary vortex asymmetry is related to the maximum instantaneous asymmetry for nonstationary separation on a cylinder normal to the flow.Abstract:
A method of determining the maximum vortex-induced side force on slender bodies at high angle of attack and zero sideslip is presented. The maximum stationary vortex asymmetry is related to the maximum instantaneous asymmetry for nonstationary separation on a cylinder normal to the flow. Thus, the twodimensional peak nonsteady lift to steady drag ratio for a cylinder is indicative of the maximum possible stationary side-force to normal-force ratio on a slender body. An effective crossflow Reynolds number is used to relate three-dimensional Reynolds number effects to two-dimension al cylinder results. Similar techniques are used to predict the maximum additional lift generated by asymmetric vortex shedding. c d d* D2 M I INread more
Citations
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Steady and Unsteady Vortex-Induced Asymmetric Loads on Slender Vehicles
L. E. Ericsson,J. P. Reding +1 more
TL;DR: In this article, the authors used the Reynolds number to estimate the pitch rate of the nose tip roll rate of a single forebody vortice, which is based on dmax and freestream conditions; usually Re = Rd Reynolds number, Rd = U^d/v^ reference area.
Journal ArticleDOI
Recent progress on the study of asymmetric vortex flow over slender bodies
TL;DR: A review of recent research progress on tip perturbation and Reynolds number effect can be found in this article, where Wang et al. provided a review of the current research progress in forebody vortex flow and its flow control.
Journal ArticleDOI
Re-examination of the Maximum Normalized Vortex-Induced Side Force
J. P. Reding,L. E. Ericsson +1 more
TL;DR: In this article, a critical review of recent experimental data tends to confirm the validity of previously published asymmetric flow concepts: 1) that the maximum side force to normal force ratio (the maximum normalized side force) on slender bodies of revolution at high angles of attack and zero sideslip occurs in the critical Reynolds number range where the maximum local flow separation asymmetry can occur; 2) body motion can lock in a driving vortex asymmetry to produce self-induced body coning; and 3) laminar vortex separation may occur on the cylinder of an ogive-cylinder at
Journal ArticleDOI
Maximum Side Forces and Associated Yawing Moments on Slender Bodies
J. Peter Reding,Lars E. Ericsson +1 more
TL;DR: In this article, a method for determining the maximum vortex-induced side force and associated yawing moment on slender bodies at high angles of attack in incompressibl e flow at effective crossflow Reynolds numbers from 104 to 108 was presented.
References
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Journal ArticleDOI
The spacing, position and strength of vortices in the wake of slender cylindrical bodies at large incidence
K. D. Thomson,D. F. Morrison +1 more
TL;DR: In this article, Schlieren photographs of the wake have been analyzed by means of the impulse flow analogy and also by considering the vortices to be part of a yawed infinite vortex street.
Journal ArticleDOI
Pressure and force distributions on a sharp-nosed circular cylinder at large angles of inclination to a uniform subsonic stream
P. J. Lamont,B. L. Hunt +1 more
TL;DR: In this paper, an experimental investigation of pressure and force distributions on a sharp-nosed circular cylinder inclined to a uniform low-speed air flow under conditions of laminar separation of the boundary layer was conducted.
Journal ArticleDOI
Separated flow about lifting bodies and impulsive flow about cylinders.
TL;DR: In this paper, the cross-flow drag and normal force coefficients are determined experimentally as a function of the relative displacement of fluid in time-dependent two-dimensional flow, and the evolution with time of the body-wake characteristics are determined from high-speed motion pictures.
Journal ArticleDOI
An experimental investigation of the oscillating lift and drag of a circular cylinder shedding turbulent vortices
TL;DR: In this article, the oscillating lift and drag on circular cylinders are determined from measurements of the fluctuating pressure on the cylinder surface in the range of Reynolds number from 4 × 103 to just above 105.
Journal ArticleDOI
Fluctuating Lift and Drag Acting on a Cylinder in a Flow at Supercritical Reynolds Numbers
TL;DR: In this article, the root-mean-square values of the lift and drag coefficients, the extreme values of these coefficients, and their power spectra at various Reynolds numbers are presented.
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