THE CORRESPONDENCE BETWEEN FLOW-HELD STRUCTURE AND CRITICAL STATES ON A 65-DEGREE DELTA WING

An extensive study into the complex relationship between the flow field structure elicited by a 65° delta wing and nonlinear and even nonanalytic behavior found in the aerodynamic response has been conducted. In this study, the locations of bifurcations in the skin-friction line topologies found as the wing was rolled about an inclined longitudinal body-axis were compared to discontinuiti es in the static loading and' variations in the unsteady rolling moment data's character. Following this comparison, a relationship between the flow structure, its ability to reach new, post-maneuver equilibriums and the aerodynamic response elicited by this flow structure is discussed.

[1]  James H. Myatt,et al.  Body-axis rolling motion critical states of a 65-degree delta wing , 1993 .

[2]  G. E. Bredon.  Topology and geometry , 1993 .

[3]  Jerry E. Jenkins,et al.  Body-axis rolling motion critical states of a 65-degree delta wing , 1993 .

[4]  Kenneth D. Visser,et al.  Measurements of Circulation and Vorticity in the Leading-Edge Vortex of a Delta Wing , 1993 .

[5]  Chih-Ming Ho,et al.  Vortex Dynamics of Delta Wings , 1989 .

[6]  Martin C. Hegedus,et al.  Modification and Validation of Conceptual Design Aerodynamic Prediction Method HASC95 With VTXCHN , 1996 .

[7]  H. Schlichting.  Boundary Layer Theory , 1955 .

[8]  Robert C. Nelson,et al.  An experimental investigation of delta wing vortex flow with and without external jet blowing , 1989 .

[9]  Jerome T. Kegelman,et al.  Effects of leading-edge shape and vortex burst on the flowfield of a70-degree-sweep delta-wing , 1989 .

[10]  W. C. Reynolds,et al.  Review of Unsteady, Driven, Separated Flows , 1985 .

[11]  R. C. Nelson,et al.  Control of leading edge vortex breakdown by blowing , 1988 .

[12]  Chih-Ming Ho,et al.  Lift Force of Delta Wings , 1990 .

[13]  Gregory A. Addington,et al.  Critical states and flow structure on a 65-deg delta wing , 1996 .

[14]  G. T. Chapman,et al.  Modeling aerodynamic discontinuities and onset of chaos in flight dynamical systems , 1987 .

[15]  Lars E. Ericsson,et al.  Unique High-Alpha Roll Dynamics of a Sharp-Edged 65-Deg Delta Wing , 1994 .

[16]  Donald Rockwell,et al.  Three-dimensional flow structure on delta wings at high angle-of-attack - Experimental concepts and issues , 1993 .

[17]  S. M. Batill,et al.  Vortex Dynamics on a Pitching Delta Wing , 1990 .

[18]  T. Ng,et al.  LEADING EDGE VORTEX AND SHEAR LAYER INSTABILITIES , 1998 .

[19]  Juan Lopez,et al.  Axisymmetric vortex breakdown Part 2. Physical mechanisms , 1990, Journal of Fluid Mechanics.