Hypersonic Finned Cones
Abstract
Understanding the aerothermodynamics of gliding hypersonic vehicles is of interest to the Department of Defense. These vehicles are slender geometries with highly swept fins, featuring highly-swept-shock/boundary-layer interactions and corner flows associated with the intersection of the fins and the body. Until recently very little was known about laminar-to-turbulent transition under these conditions, yet it is critical because of the effect on heat transfer and boundary-layer separation. Expected are the nonlinear interaction of modes to include Mack~s 2nd mode, cornerflow instabilities, attachment-line instabilities/leading-edge contamination, crossflow, and so forth, coupled with oblique shocks and a horseshoe vortex. Using the model of a straight slender cone with a single fin, the primary focus of the proposed three-year effort will be on understandingand modeling of the transition process using Spatial BiGlobal, PSE-3D, and other advanced stability analyses. The parameter space of fin sweep, leading-edge radius, nose radius, will be narrowed from our prior research under ONR grant N00014-16-1-2434 to focus in-depth analysis and validation of a few configurations of interest. These particular configurations will be selectedin consultation with Professor Steven Schneider~s experimental group at Purdue with whom this research has been and will continue to be integrally conducted. This research also complements the work of Professor Graham Candler at the University of Minnesota and Dr. Neal Bitter at Sandia National Labs. Careful verification and validation are key to developing tools for modeling,transition prediction, and design, and the result will lead to smaller, more manageable uncertainties in flow properties.The finned cone geometry selected for this work is relevant to the Navy Hypervelocity Projectile (HVP).
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Aug 15, 2019
- Source ID
- N000141912500
Entities
People
- Helen Reed
Organizations
- Office of Naval Research
- Texas Engineering Experiment Station
- United States Navy