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Receptivity of Mack modes to localized unsteady blowing and suction in a chemical non-equilibrium hypersonic boundary layer
This paper studies the local receptivity of the Mack-mode instability to localized unsteady blowing and suction (UBS) in a chemical non-equilibrium...
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Mack-mode instabilities on a cooled flared cone with discrete roughness elements at Mach 6
Boundary-layer transition, and the increased heating that accompanies it, has a great effect on how hypersonic vehicles and projectiles are designed....
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Attenuation of hypersonic second-mode boundary-layer instability with an ultrasonically absorptive silicon-carbide foam
Unsteady surface pressure measurements have been carried out on a flat-plate test article in the Air Force Research Laboratory’s Mach-6 Ludwieg Tube...
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Global analysis of nonlinear second-mode development in a Mach-6 boundary layer from high-speed schlieren data
The second-mode instability on a 7° half-angle sharp cone at Mach 6 is analyzed using high-speed calibrated schlieren imagery at a frame rate near...
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Turbulent Transition Control Using Porous Surfaces in Hypersonic Boundary Layer
Hypersonic boundary layer on porous surfaces is simulated to investigate the effect of porous surfaces on the transition process. The fundamental...
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Direct-Numerical Simulation with the Stability Theory for Turbulent Transition in Hypersonic Boundary Layer
Laminar-to-turbulent transition in hypersonic boundary layer is numerically investigated using the direct-numerical simulation (DNS) method combined...
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On the inviscid energetics of Mack’s first mode instability
AbstractHigh-speed boundary layer transition is dominated by the modal, exponential amplification of the oblique Mack’s first mode waves in...
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Interaction of second-mode wave packets with an axisymmetric expansion corner
AbstractExperiments were performed in a Mach-6 shock tunnel to examine the impact of an abrupt expansion on hypersonic boundary-layer instability...
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Wall temperature effects on the stability of leeward vortices of a blunt inclined cone
Streamwise vortex instability is one of the most potent mechanisms for the transition of the three-dimensional boundary layers. By using the global...
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Effect of surface cooling on second-mode dominated hypersonic boundary layer transition
Experiments were performed in the low-enthalpy AFRL Mach 6 Ludwieg Tube to investigate the effects of surface temperature on hypersonic boundary...
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Detection of second-mode instabilities on a flared cone in Mach 6 quiet flow with linear array focused laser differential interferometry
AbstractIn this work, an enhanced version of the focused laser differential interferometer (FLDI) is used to measure second-mode instabilities in the...
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Broadband design of acoustic metasurfaces for the stabilization of a Mach 4 boundary layer flow
A piecewise acoustic metasurface is designed to suppress the first mode while marginally amplifying the Mack second mode in a Mach 4 flat-plate...
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Experimental investigation of the effect of transpiration cooling on second mode instabilities in a hypersonic boundary layer
AbstractThe influence of localized nitrogen transpiration on second mode instabilities in a hypersonic boundary layer is experimentally investigated....
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Rarefaction effects on hypersonic boundary-layer stability
Near-space hypersonic vehicles could experience both continuous and rarefied flow regimes during the flight through atmosphere. The rarefaction...
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Acoustic receptivity of high-speed boundary layers on a flat plate at angles of attack
AbstractDirect numerical simulation and theoretical analysis of acoustic receptivity are performed for the boundary layer on a flat plate in Mach 6...
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Stabilization of hypersonic boundary layer by combining micro-blowing and a porous coating
The extensive involvement of blowing in ablation and transpiration cooling directly influences the hypersonic boundary layer (HBL) transition. This...
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Notes on the hypersonic boundary layer transition
A brief discussion is given in this note to clarify the transition path of the hypersonic boundary layer. The first mode plays an important role in...
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Research on the control of supersonic jet under different boundary conditions
The characteristics and control of supersonic jet are hot issues in propulsion system, especially the rectangular underexpanded supersonic jet. In...
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Receptivity of high-speed boundary layer on a flat plate at angles of attack: entropy and vorticity waves
AbstractIn the paper (Theoret Comput Fluid Dyn 36:705–722, 2022), we analyzed acoustic receptivity of the boundary layer on a flat plate in Mach 6...
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Wall pressure beneath a transitional hypersonic boundary layer over an inclined straight circular cone
Properties of wall pressure beneath a transitional hypersonic boundary layer over a 7 ∘ half-angle blunt cone at angle of attack 6 ∘ are studied by...
