Results 61 to 70 of about 72,125 (260)

Sound shield [PDF]

open access: yes, 1982
An improved test section for a supersonic or hypersonic wind tunnel is disclosed wherein the model tested is shielded from the noise normally radiated by the turbulent tunnel wall boundary layer.
Beckwith, I. E., Creel, T. R., Jr.
core   +1 more source

The Promise of Solid Lubricants for a Sustainable Future

open access: yesAdvanced Materials, Volume 38, Issue 8, 6 February 2026.
Lubricants are vital for technology, saving energy and resources. The industry seeks sustainable solutions beyond fossil fuels. Solid lubricants offer extremely low friction and reduce environmental impact, especially in harsh conditions. Can these solids truly replace liquid lubricants, or are they limited to extreme applications?
Philipp G. Grützmacher   +7 more
wiley   +1 more source

Analysis of S-duct's fluid-solid-thermal coupling characteristic considering creep effect

open access: yesHangkong gongcheng jinzhan
For the hypersonic vehicle whose inlet and combustion chamber are not on the same axis,the S-duct is an important component,and its main function is to turn the air flow. In order to study the influence of multi-field coupling effect of creep material on
LIN Yuan   +9 more
doaj   +1 more source

Techniques for insulating cryogenic fuel containers Patent [PDF]

open access: yes, 1967
Carbon dioxide purge systems to prevent condensation in spaces between cryogenic fuel tanks and hypersonic vehicle ...
Jackson, L. R.
core   +1 more source

Advanced Ceramics in Aerospace and Defense: The Interrelationship between Traditional and Additive Manufacturing Approaches

open access: yesAdvanced Materials Technologies, Volume 11, Issue 3, 5 February 2026.
Additive manufacturing revolutionizes production by enabling on‐demand, customized, and sustainable manufacturing with streamlined supply chains. While metal and polymer AM are well‐established, advanced ceramic AM is rapidly emerging, overcoming traditional material challenges.
Kateryna Oleksandrivna Shvydyuk   +2 more
wiley   +1 more source

Combined effects of double flat aerodisks and rear opposing jets on hypersonic spiked blunt body drag and heat reduction: An uncertainty and sensitivity analysis

open access: yesCase Studies in Thermal Engineering
This study numerically investigates the combined effects of double flat aerodisks and rear opposing jets on the drag and heat reduction performance of a hypersonic spiked blunt body. Uncertainty quantification and sensitivity analysis are performed using
Ni He, Yu Pan, Zhenkang Zhang, Jian Chen
doaj   +1 more source

A Scramjet Compression System for Hypersonic Air Transportation Vehicle Combined Cycle Engines

open access: yesEnergies, 2018
This paper proposes a compression system for a scramjet, to be used as part of a combined cycle engine on a hypersonic transport vehicle that can achieve sustained flight at 8 Mach 8.
Devendra Sen   +2 more
doaj   +1 more source

Landing arrangement for aerospace vehicle Patent [PDF]

open access: yes, 1964
Aerospace vehicle with variable planform for hypersonic and subsonic ...
Lockwood, V. E., Riebe, J. M.
core   +1 more source

Wavelet-based Adaptive Techniques Applied to Turbulent Hypersonic Scramjet Intake Flows

open access: yes, 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.
Behr, Marek   +4 more
core   +1 more source

Hypersonic Modes in Nanophononic Semiconductors [PDF]

open access: yesPhysical Review Letters, 2008
Frequency gaps and negative group velocities of hypersonic phonon modes in periodically arranged composite semiconductors are presented. Trends and criteria for phononic gaps are discussed using a variety of atomic-level theoretical approaches. From our calculations, the possibility of achieving semiconductor-based one-dimensional phononic structures ...
Hepplestone, SP, Srivastava, GP
openaire   +3 more sources

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