Results 11 to 20 of about 23,365 (215)
Shock and Vibration, 2011 Damping treatments have been extensively used as a powerful means to damp out structural resonant vibrations. Usually, damping materials are fully covered on the surface of plates.
Zheng Ling +3 more
doaj +1 more source
Effect of tangential swirl air inlet angle on the combustion efficiency of a hybrid powder-solid ramjet [PDF]
, 2019 A new ramjet configuration using powder and solid fuel as propellant is investigated, namely, hybrid powder-solid ramjet (HPSR). Boron particles were used as the powder in this study.
ANSYS Inc +49 more
core +1 more source
Multidisciplinary design of a micro-USV for re-entry operations [PDF]
, 2010 Unmanned Space Vehicles (USV) are seen as a test-bed for enabling technologies and as a carrier to deliver and return experiments to and from low-Earth orbit.
Liqiang, Hou +2 more
core +1 more source
Robust multi-fidelity design of a micro re-entry unmanned space vehicle [PDF]
, 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
Interstellar travels aboard radiation-powered rockets [PDF]
, 2019 We model accelerated trips at high-velocity aboard light sails (beam-powered propulsion in general) and radiation rockets (thrust by anisotropic emission of radiation) in terms of Kinnersley's solution of general relativity and its associated geodesics ...
Füzfa, A.
core +2 more sources
Compton rockets and the minimum power of relativistic jets [PDF]
, 2010 The power of a relativistic jet depends on the number of leptons and protons carried by the jet itself. We have reasons to believe that powerful gamma-ray flat spectrum radio sources emit most of their radiation where radiative cooling is severe.
Abdo +34 more
core +1 more source
On the Angular Momentum of Rockets, Balloons, and Other Variable Mass Systems
, 2016 Variable mass systems are a classic example of open systems in classical mechanics. The reaction forces due to mass variation propel ships, balloons, and rockets. Unlike free constant mass systems, the angular momentum of these systems is not of constant magnitude due to the change in mass.
Nanjangud, Angadh, Eke, Fidelis
openaire +2 more sources
Angewandte Chemie, EarlyView.Compositionally engineered mixed solvated cocrystals enable modulation of thermosalient actuation. Guest ratio controls thermosalient temperature and propulsion intensity, providing a tunable platform for designing crystalline systems that exhibit stimuli‐responsive mechanical motion.
Ernesto A. Hernández‐Morales +5 more
wiley +2 more sources
Analytical control laws for interplanetary solar sail trajectories with constraints [PDF]
, 2008 An indirect method is used to obtain an analytical control law for a spacecraft with a low-thrust propulsion system which is constituted by a solar sail coupled with a solar electric thruster. Constraints on the control inputs for such as the system need
McInnes, C.R., Uchiyama, Kenji
core
Beyond Earth: Resilience of Quasi‐2D Perovskite Solar Cells in Space
Advanced Materials, EarlyView.In the article (DOI: 10.1002/adma.202520433), Christoph Putz and co‐workers demonstrate rigid quasi‐2D perovskite solar cells operating in low Earth orbit, delivering stable power for more than 100 days under real‐space conditions. In‐orbit performance is correlated with extensive ground‐based thermal and proton‐irradiation studies on rigid and ...
Christoph Putz +17 more
wiley +1 more source