Aerodynamic Performance of Projectiles with Axisymmetric and Non-Axisymmetric Boattails
Abstract
Aerodynamic properties of projectile shapes with axisymmetric and nonaxisymmetric boattail shapes are presented. The nonaxisymmetric boattail is formed by a number of flat surfaces. Three flat surfaces equally spaced would develop into a triangle at the base; all non-conical data in this report are for the three-surface, or triangular, boattail. Surface pressure measurements were obtained on the non-conical boattail and a comparison of these measurements to three dimensional flow field computations for the same shape are reported. Inviscid computations on several axisymmetric shapes are compared to experimental data obtained on non-axisymmetric boattail shapes so that an evaluation of the non-axisymmetric boattail performance could be made. The non- axisymmetric shapes can have significant stability advantages over axisymmetric shapes and still retain the advantage of drag reduction by boattailing.
Document Details
- Document Type
- Technical Report
- Publication Date
- May 01, 1980
- Accession Number
- ADA086091
Entities
People
- Lyle D. Kayser
- Walter B. Sturek
Organizations
- Ballistic Research Laboratory