Results 61 to 70 of about 67,117 (293)
Effect of streaks on hypersonic boundary layer instability [PDF]
arXiv, 2023 Hypersonic boundary layers exhibit diverse transition pathways, influenced by various flow conditions and environments. Non-modal mechanisms, such as the lift-up effect, are recognized as pivotal contributors to transition, particularly over complex geometries like rough walls or blunted forebodies.
arxiv
Hypersonic Jets of Detonation Products in the Hydrodynamic Collapse of Macroscopic Voids
Propellants, Explosives, Pyrotechnics, EarlyView.Using machined mm‐scale voids at the surface of PBX 9501 samples, detonation‐driven jets of product gases form. We find that there is an optimal distance from the charge surface at which the energy transfer due to this jetting is maximized using witness plate impact experiments and hydrocode simulations.
Jason J. Wilkening +3 more
wiley +1 more source
Heat protection apparatus Patent [PDF]
, 1966 Development of thermal insulation system for wing and control surfaces of hypersonic aircraft and reentry ...
Hill, P. R., Trout, O. F., Jr.
core +1 more source
DronesHypersonic unmanned flight vehicles have complex dynamic characteristics, such as nonlinearity, strong coupling, multiple constraints, and uncertainty.
Haixia Ding +4 more
doaj +1 more source
A Proposal for Long-Term Missions of Small Lunar Rovers Using an MLI Curtain System
International Journal of Aerospace Engineering, 2019 This paper proposes a lunar night survival method for small rovers using an MLI (Multilayer Insulation) curtain system for long-term missions. Until recently, it was difficult to install RHU (Radioisotope Heating Units) or other temperature maintenance ...
Jang-Joon Lee, Kyu-Hong Kim
doaj +1 more source
Shanghai Jiaotong Daxue xuebao, 2021 In view of the issue that surface catalysis has a significant influence on aerodynamic heating of hypersonic vehicle heatshield and is difficult to accurately predict, a four-step surface heterogeneous catalytic model including physisorption ...
LI Qin, YANG Xiaofeng, DONG Wei, DU Yanxia
doaj +1 more source
Collaborating in future states—Contextual instability, paradigmatic remaking, and public policy
Australian Journal of Public Administration, EarlyView.Abstract Collaboration is ubiquitous in public policy life, with its presence and profile determined by prevailing governance conditions. Commitments to globalisation and marketisation in the latter part of the 20th century marked the onset of an era defined by collaboration, between and across tiers and spheres of government, with non‐state actors ...
Helen Sullivan
wiley +1 more source
, 2011 Aims: Bow shock waves are a common feature of groups and clusters of galaxies since they are generated as a result of supersonic motion of galaxies through the intergalactic medium. The goal of this work is to present an analytical solution technique for
Blondin +9 more
core +1 more source
Application of AA-PSP to hypersonic flows: the double ramp model [PDF]
, 2012 Anodized Aluminium Pressure Sensitive Paint (AA-PSP) is known for its rapid response characteristics, making it a highly desirable technique when studying high-speed phenomenon on a global scale.
Basu +24 more
core +1 more source
Mach 4 Simulating Experiment of Pre-Cooled Turbojet Engine Using Liquid Hydrogen
Aerospace, 2022 This study investigated a pre-cooled turbojet engine for a Mach 5 class hypersonic transport aircraft. The engine was demonstrated under takeoff and Mach 2 flight conditions, and a Mach 5 propulsion wind tunnel test is planned.
Hideyuki Taguchi +5 more
doaj +1 more source