论文信息 - Unsteady behavior of spiral leading-edge vortex breakdown

Unsteady behavior of spiral leading-edge vortex breakdown

Unsteady characteristics of the leading-edge vortex breakdown on a 65-deg delta wing are investigated. Emphasis is placed on the longitudinal motion of the breakdown region and its spiral structure under static as well as dynamic conditions as they have an important impact on vehicle flight mechanics and may cause aeroelastic problems. The onset of the breakdown region is found to be highly unsteady, with axial fluctuations of up to 20 percent centerline chord. Under dynamic conditions important delays in the breakdown region are observed. (Author)

E. Hanff | X. Huang

[1] E. Hanff,et al. Roll-induced cross-loads on a delta wing at high incidence , 1991 .

[2] The inner viscous solution for the core of a leading-edge vortex , 1963 .

[3] C. Bruecker. Development and structural changes of vortex breakdown , 1995 .

[4] M. Hall,et al. A theory for the core of a leading-edge vortex , 1961, Journal of Fluid Mechanics.

[5] E. Hanff,et al. Prediction of leading-edge vortex breakdown on a delta wing oscillating in roll , 1992 .

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

[7] Juan Lopez,et al. Axisymmetric vortex breakdown Part 1. Confined swirling flow , 1990, Journal of Fluid Mechanics.

[8] David L. Darmofal,et al. The role of vorticity dynamics in vortex breakdown , 1993 .

[9] Instabilities of vortex breakdown - Their structure and growth , 1995 .

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

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

[12] C. Brücker,et al. Study of vortex breakdown by particle tracking velocimetry (PTV) , 1992 .

[13] M. Visbal,et al. Computational and physical aspects of vortex breakdown on delta wings , 1995 .