Re-examination of the Maximum Normalized Vortex-Induced Side Force

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) that body motion can lock in a driving vortex asymmetry to produce self-induced body coning; and 3) that laminar vortex separation may occur on the cylinder of an ogive-cylinder at high angles of attack, even when the nose experiences turbulent separation. In addition, the present analysis offers a realistic explanation as to why a minimum normalized side force is realized at a Reynolds number slightly above that for the maximum normalized side force. c d

[1]  G. T. Chapman,et al.  Onset of aerodynamic side forces at zero sideslip on symmetric forebodies at high angles of attack , 1974 .

[2]  L. Ericsson,et al.  Karman Vortex Shedding and the Effect of Body Motion , 1980 .

[3]  L. Ericsson,et al.  Maximum Vortex-Induced Side Force , 1978 .

[4]  E. R. Keener.  Oil-flow separation patterns on an ogive forebody , 1983 .

[5]  G. T. Chapman,et al.  Side forces on forebodies at high angles of attack and Mach numbers from 0.1 to 0.7: two tangent ogives, paraboloid and cone , 1977 .

[6]  J. P. Reding,et al.  Dynamics of Forebody Flow Separation and Associated Vortices , 1985 .

[7]  Dhanvada M. Rao,et al.  Side-Force Alleviation on Slender, Pointed Forebodies at High Angles of Attack , 1979 .

[8]  P. J. Lamont.  Pressure measurements on an ogive-cylinder at high angles of attack with laminar, transitional, or turbulent separation , 1980 .

[9]  Brian L. Hunt,et al.  Asymmetric vortex forces and wakes on slen-der bodies , 1982 .

[10]  E. Achenbach.  Influence of surface roughness on the cross-flow around a circular cylinder , 1971, Journal of Fluid Mechanics.

[11]  L. Ericsson.  Aeroelastic instability caused by slender payloads. , 1967 .

[12]  J. P. Reding,et al.  Vortex-induced asymmetric loads in 2-D and 3-D flows , 1980 .

[13]  J. P. Reding,et al.  Alleviation of Vortex-Induced Asymmetric Loads , 1980 .

[14]  T. Yoshinaga,et al.  Coning motion of slender bodies at high angles of attack in low speed flow , 1981 .

[15]  S. Suzuki,et al.  On the Aerodynamic Force Acting on a Circular Cylinder in the Critical Range of the Reynolds Number , 1979 .

[16]  E. R. Keener,et al.  Wind tunnel investigation of the aerodynamic characteristics of five forebody models at high angles of attack at Mach numbers from 0.25 to 2 , 1975 .

[17]  J. Humphreys.  On a circular cylinder in a steady wind at transition Reynolds numbers , 1960, Journal of Fluid Mechanics.

[18]  L. Ericsson,et al.  Criterion for Vortex Periodicity in Cylinder Wakes , 1979 .

[19]  G. T. Chapman,et al.  Side forces on a tangent ogive forebody with a fineness ratio of 3.5 at high angles of attack and Mach numbers from 0.1 to 0.7 , 1977 .

[20]  Lars E. Ericsson,et al.  Dynamic Stall Simulation Problems , 1971 .

[21]  L. Ericsson,et al.  Maximum Side Forces and Associated Yawing Moments on Slender Bodies , 1979 .

[22]  P. Lamont,et al.  The complex asymmetric flow over a 3.5D ogive nose and cylindrical afterbody at high angles of attack , 1982 .

[23]  P. Bearman.  On vortex shedding from a circular cylinder in the critical Reynolds number régime , 1969, Journal of Fluid Mechanics.

[24]  L. E. Ericsson,et al.  Vortex-Induced Asymmetric Loads on Slender Vehicles. , 1979 .

[25]  Body vortex formation on missiles in incompressible flows , 1977 .

[26]  E. Achenbach,et al.  Distribution of local pressure and skin friction around a circular cylinder in cross-flow up to Re = 5 × 106 , 1968, Journal of Fluid Mechanics.

[27]  G. W. Jones,et al.  Aerodynamic forces on a stationary and oscillating circular cylinder at high Reynolds numbers , 1969 .

[28]  J. P. Reding,et al.  Steady and Unsteady Vortex-Induced Asymmetric Loads on Slender Vehicles , 1981 .