Unmanned Aerial Vehicle (UAV) propulsion technology is significantly related to the flight
performance of UAVs, which has become one of the most important development directions …

For more than half a century, researchers have been aware that freestream fluctuations have
an important effect on laminar-turbulent transition. A century of effort has also been devoted …

U= freestream velocity x= axial coordinate for 2-D nozzles, usually from the nozzle throat y=
vertical coordinate, in the curvature plane for 2-D nozzles z= for 2-D nozzles, a horizontal …

This paper documents the programmatic context and considerations that have shaped the
development and execution of a number of research initiatives implemented by the Air Force …

The Hypersonic International Flight Research Experimentation (HIFiRE) program is a
hypersonic flight test program executed by the Air Force Research Laboratory and …

Direct numerical simulations are used to examine the pressure fluctuations generated by
fully developed turbulence in a Mach 2.5 turbulent boundary layer, with an emphasis on the …

Hypersonic boundary layer transition is a hot yet challenging problem restricting the
development and breakthrough of hypersonic aerodynamics. In recent years, despite great …

Laminar-turbulent transition on the Crew Exploration Vehicle (or Orion) is likely to be
dominated by the effects of ablation and the laminar-ablated roughness, both isolated and …

The boundary layer on a sharp-tip, partially flared, actively cooled cone with discrete
roughness elements has been studied in a quiet Mach 6 wind tunnel using linear array …

Boundary-layer transition, and the increased heating that accompanies it, has a great effect
on how hypersonic vehicles and projectiles are designed. The Mack-mode instability is the …