Results 11 to 20 of about 48,655 (224)

Universal behavior of internal friction in glasses below T : anharmonicity vs relaxation [PDF]

open access: yes, 2006
Comparison of the internal friction at hypersonic frequencies between a few K and the glass transition temperature Tg for various glasses brings out general features. At low temperature, internal friction is only weakly dependent on the material. At high
C. A. Angell   +18 more
core   +3 more sources

Hypersonic aerodynamics on thin bodies with interaction and upstream influence [PDF]

open access: yes, 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   +1 more source

Nonlinear Modeling Study of Aerodynamic Characteristics of an X38-like Vehicle at Strong Viscous Interaction Regions

open access: yesEntropy, 2022
Strong viscous interaction and multiple flow regimes exist when vehicles fly at high altitude and high Mach number conditions. The Navier–Stokes(NS) solver is no longer applicable in the above situation.
Dingwu Jiang   +3 more
doaj   +1 more source

On upstream influence in supersonic flows [PDF]

open access: yes, 2005
The general problem of propagation of three-dimensional disturbances in viscous supersonic flows is considered in the framework of characteristic analysis.
Krechetnikov, R., Lipatov, I. I.
core   +1 more source

Aerodisk Effect on Hypersonic Boundary Layer Transition and Heat Transfer of HIFiRE-5 Vehicle

open access: yesAerospace, 2022
The substantial aerodynamic drag and severe aerothermal loads, which are closely related to boundary layer transition, challenge the design of hypersonic vehicles and could be relieved by active methods aimed at drag and heat flux reduction, such as ...
Yatian Zhao, Zhiyuan Shao, Hongkang Liu
doaj   +1 more source

Assessing the Sustainability of Liquid Hydrogen for Future Hypersonic Aerospace Flight

open access: yesAerospace, 2022
This study explored the applications of liquid hydrogen (LH2) in aerospace projects, followed by an investigation into the efficiency of ramjets, scramjets, and turbojets for hypersonic flight and the impact of grey, blue, and green hydrogen as an ...
Abdalrahman Khaled Mohammad   +4 more
doaj   +1 more source

Experimental Investigation on the Control of Hypersonic Shock Wave/Boundary Layer Interaction Using Surface Arc Plasma Actuators at Double Compression Corner

open access: yesAerospace, 2023
Compression corner shock wave/boundary layer interaction (SWBLI) is a typical shock wave/boundary layer interaction (SWBLI) problem in supersonic/hypersonic flows. In previous studies, the separation flow is usually caused by a single shock wave. However,
Bo Yang   +5 more
doaj   +1 more source

Fluid/Thermal/Structural Coupling Simulation on Effects of Forebody-Inlet Thermal Deformation on Intake Performance

open access: yes气体物理, 2023
Intake performance is one of the most important factors relating with the forebody-inlet design for air-breathing hypersonic vehicles. The intake performance will be altered due to hypersonic flow field change by the thermal deformation of forebody and ...
Si-yi LI   +5 more
doaj   +1 more source

Robust multi-fidelity design of a micro re-entry unmanned space vehicle [PDF]

open access: yes, 2011
This article addresses the preliminary robust design of a small-scale re-entry unmanned space vehicle by means of a hybrid optimization technique. The approach, developed in this article, closely couples an evolutionary multi-objective algorithm with a ...
Aupoix B.   +9 more
core   +1 more source

Numerical study on throttling characteristics of RBCC engines in ejector mode

open access: yesCase Studies in Thermal Engineering
Investigating the throttling characteristics of Rocket-Based Combined Cycle (RBCC) engines in ejector mode is crucial for adapting to varied flight mission demands.
Jikai Chen   +9 more
doaj   +1 more source

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