VISCOUS DRAG REDUCTION OF A NOSE BODY

The convex curvature concept of viscous drag reduction has been applied to an axisymmetric nose-body combination. The work is described in two parts. A modified mixing-length formulation is first qualified in several complex turbulent boundary layers that are primarily curved. This is then used to design an axisymmetric nose that incorporates several recently proposed concepts of viscous drag reduction. Primarily, application is made of the fact that compared to a flat surface, the effect of streamwise convex curvature is to reduce skin friction and the level remains lower even after the curvature is removed. A parametric study has been conducted to incorporate the conflicting requirements in a nose, viz, the application of the drag reduction concepts at an optimised level while causing no separation. The axial distribution of the cross-section area ratio is found to be critical to separation.

• Supplemental Notes:
  • Am. Inst. Aeronautics & Astronautics J. 27 (1989), p.274 (Mar.) [9 pp., 29 ref., 18 fig.]
• Authors:
  • Bandyopadhyay, P R
• Publication Date: 1989

Language

• English

Subject/Index Terms

• Old TRIS Terms: Drag reduction; Viscous resistance
• Subject Areas: Marine Transportation;

Filing Info

• Accession Number: 00696221
• Record Type: Publication
• Source Agency: British Maritime Technology
• Files: TRIS
• Created Date: Aug 14 1995 12:00AM