Results 1 to 10 of about 56,125 (155)
Some aspects of hypersonic flow over power law bodies [PDF]
, 1969 This study concerns the hypersonic flow over blunt bodies in two specific cases. The first is the case when the Mach number is infinite and the ratio of the specific heats approaches one. This is sometimes referred to as the ‘Newtonian limit’. The second
Hornung, H. G.
core +3 more sources
Transition in Hypersonic Boundary Layers: Role of Dilatational Waves [PDF]
arXiv, 2015 Transition and turbulence production in a hypersonic boundary layer is investigated in a Mach 6 quiet wind tunnel using Rayleigh-scattering visualization, fast-response pressure measurements, and particle image velocimetry. It is found that the second instability acoustic mode is the key modulator of the transition process.
Chen, Shiyi +7 more
arxiv +4 more sources
Wavelet-based Adaptive Techniques Applied to Turbulent Hypersonic Scramjet Intake Flows [PDF]
, 2013 The simulation of hypersonic flows is computationally demanding due to large gradients of the flow variables caused by strong shock waves and thick boundary or shear layers. The resolution of those gradients imposes the use of extremely small cells in the respective regions.
Behr, Marek +4 more
arxiv +3 more sources
Hypersonic aerodynamics on thin bodies with interaction and upstream influence [PDF]
, 1994 In the fundamental configuration studied here, a steady hypersonic free stream flows over a thin sharp aligned airfoil or flat plate with a leading-edge shock wave, and the flow field in the shock layer (containing a viscous and an inviscid layer) is ...
Khorrami, AF, Smith, FT
core +3 more sources
On the influence of acoustic waves on coherent bremsstrahlung in crystals [PDF]
Mod.Phys.Lett. A19 (2004) 99-110, 2003 We investigate the coherent bremsstrahlung by relativistic electrons in a single crystal excited by hypersonic vibrations. The formula for the corresponding differential cross-section is derived in the case of a sinusoidal wave. The conditions are specified under which the influence of the hypersound is essential.
A. A. SAHARIAN +6 more
arxiv +3 more sources
Hypersonic Flow Theory and Hypersonic Aerodynamics [PDF]
Journal of Applied Mechanics, 1960 W Hayes +3 more
openalex +3 more sources
Stabilized detonation for hypersonic propulsion [PDF]
Proceedings of the National Academy of Sciences, 2021 Significance There is now an intensifying international effort to develop robust propulsion systems for hypersonic and supersonic flight. Such a system would allow flight through our atmosphere at very high speeds and allow efficient entry and exit from planetary atmospheres.
Daniel A. Rosato +5 more
openaire +2 more sources
Hypersonic Phononic Crystals [PDF]
Physical Review Letters, 2005 In this Letter we propose the use of hypersonic phononic crystals to control the emission and propagation of high frequency phonons. We report the fabrication of high quality, single crystalline hypersonic crystals using interference lithography and show that direct measurement of their phononic band structure is possible with Brillouin light ...
Edwin L. Thomas +4 more
openaire +5 more sources
On the evolution of research in hypersonics: application of natural language processing and machine learning [PDF]
Archives of Advanced Engineering Science, 1-16 (2023), 2022 Research and development in hypersonics have progressed significantly in recent years, with various military and commercial applications being demonstrated increasingly. Public and private organizations in several countries have been investing in hypersonics, with the aim to overtake their competitors and secure/improve strategic advantage and ...
arxiv +1 more source
Quantum electromechanics of a hypersonic crystal [PDF]
Nature Nanotechnology, 2019 Radiation pressure within engineered structures has recently been used to couple the motion of nanomechanical objects with high sensitivity to optical and microwave electromagnetic fields. Here, we demonstrate a form of electromechanical crystal for coupling microwave photons and hypersonic phonons by embedding the vacuum-gap capacitor of a ...
Mohammad Mirhosseini +6 more
openaire +6 more sources