The Vortex Ring State as a Spatially and Temporally Developing Wake Instability

[1]  B. P. Gupta,et al.  Theoretical Analysis of the Aerodynamic Stability of Multiple, Interdigitated Helical Vortices , 1974 .

[2]  J Scheiman,et al.  A TABULATION OF HELICOPTER ROTOR-BLADE DIFFERENTIAL PRESSURES, STRESSES, AND MOTIONS AS MEASURED IN FLIGHT , 1964 .

[3]  J. G. Leishman,et al.  Correlation of Helicopter Rotor Tip Vortex Measurements , 2000 .

[4]  F. Caradonna Performance Measurement and Wake Characteristics of a Model Rotor in Axial Flight , 1999 .

[5]  Anton J. Landgrebe,et al.  The Wake Geometry of a Hovering Helicopter Rotor and its Influence on Rotor Performance , 1972 .

[6]  Simon Newman,et al.  Blade twist effects on rotor behaviour in the vortex ring state , 2002 .

[7]  J. Gordon Leishman,et al.  Technical Note: Accuracy of Straight-Line Segmentation Applied to Curvilinear Vortex Filaments , 2001 .

[8]  W. Johnson,et al.  Recent developments in rotary-wing aerodynamic theory , 1986 .

[9]  S. Widnall The stability of a helical vortex filament , 1972, Journal of Fluid Mechanics.

[10]  H. Levy,et al.  The Steady Motion and Stability of a Helical Vortex , 1928 .

[11]  Daniel,et al.  Experimental and Theoretical Investigations to Develop a Model of Rotor Aerodynamics Adapted to Steep Descents , 2002 .

[12]  Mahendra J. Bhagwat,et al.  Stability Analysis of Helicopter Rotor Wakes in Axial Flight , 2000 .

[13]  Mark D. Betzina Tiltrotor Descent Aerodynamics: A Small-Scale Experimental Investigation of Vortex Ring State , 2001 .

[14]  Robin B. Gray,et al.  Empirical Relation Between Induced Velocity, Thrust, and Rate of Descent of a Helicopter Rotor as Determined by Wind-tunnel Tests on Four Model Rotors , 1951 .

[15]  J. Gordon Leishman,et al.  Stability, Consistency and Convergence of Time-Marching Free-Vortex Rotor Wake Algorithms , 2001 .

[16]  J. L. Tangler,et al.  An experimental investigation of vortex stability, tip shapes, compressibility, and noise for hovering model rotors , 1973 .

[17]  David A. Peters,et al.  Momentum Theory, Dynamic Inflow, and the Vortex-Ring State , 1982 .

[18]  J. Gordon Leishman,et al.  Rotor Free-Wake Modeling Using a Pseudo-Implicit Technique — Including Comparisons with Experimental Data , 1995 .

[19]  J. Gordon Leishman,et al.  DEVELOPMENTS IN THE VISUALIZATION OF ROTOR WAKES USING THE WIDE-FIELD SHADOWGRAPH METHOD , 1993 .

[20]  Kenneth B. Amer,et al.  A “New” Philosophy of Structural Reliability, Fail Safe Versus Safe Life—The 1988 Alexander A. Nikolsky Lecture , 1989 .

[21]  J. Gordon Leishman,et al.  Free-Vortex Filament Methods for the Analysis of Helicopter Rotor Wakes , 2002 .

[22]  Julian Wolkovitch,et al.  Analytical Prediction of Vortex-Ring Boundaries for Helicopters in Steep Descents , 1972 .

[23]  J. G. Leishman,et al.  Rotor free-wake modeling using a pseudoimplicit relaxation algorithm , 1995 .

[24]  J. Gordon Leishman,et al.  Principles of Helicopter Aerodynamics , 2000 .

[25]  H. H. Heyson A momentum analysis of helicopters and autogyros in inclined descent, with comments on operational restrictions , 1975 .

[26]  W. P Hendal,et al.  The field of flow through a helicopter rotor obtained from wind tunnel smoke tests , 1950 .

[27]  J. Gordon Leishman,et al.  Free-Wake Analysis of Tandem, Tilt-Rotor and Coaxial Rotor Configurations , 1996 .

[28]  Dewey H. Hodges,et al.  Linear Flap-Lag Dynamics of Hingeless Helicopter Rotor Blades in Hover , 1972 .

[29]  J. G. Leishman,et al.  A Semi-Empirical Model for Dynamic Stall , 1989 .

[30]  G. Batchelor,et al.  An Introduction to Fluid Dynamics , 1968 .

[31]  Akira Azuma,et al.  Experiments on a model helicopter rotor operating in the vortex ringstate. , 1966 .