Results 71 to 80 of about 36,758 (316)
Aerospace, 2022 Current environmental policies for the aviation sector motivate the use of cleaner propulsion alternatives in order to reduce their CO2 footprint and noise pollution in the coming years.
Darwin Jimenez +4 more
doaj +1 more source
EVALUATION OF THE PERFORMANCE OF THE PROPULSION LEDOREZNOY MACHINES
EurasianUnionScientists, 2021 Purpose: the aim of the analysis justify the selection of the type of propulsion ledoreznoy the machines with a specific working body. Design / methodology / approach: we present the averaged values of thrust for various types of working bodies LRM (disk, bar, bolt cutters).
A. Malygin, I. Dunaev
openaire +2 more sources
Current Status and Challenges in Data Collection for Aerospace Coatings Deposited by Plasma Spraying
Advanced Engineering Materials, EarlyView.An innovative approach has been integrated into the GRENAT project to optimize plasma spraying and coating performance. Raw materials are accelerated and melted in the plasma generated by torches, creating coatings. Monitoring sensors collect process data which are combined with ex situ characterization data.
Lila Randriamananjara +8 more
wiley +1 more source
Digital simulation of gas turbine steady-state and transient performance for current and advanced marine propulsion systems [PDF]
, 2009 The research study focuses on the idea of simulation of an Integrated Full Electric Propulsion System. The simulation required the development of a gas turbine performance model that could predict the dynamic behaviour of the engine in response to a ...
Mody, Bhavik
core
Survey of highly non-Keplerian orbits with low-thrust propulsion [PDF]
, 2011 Celestial mechanics has traditionally been concerned with orbital motion under the action of a conservative gravitational potential. In particular, the inverse square gravitational force due to the potential of a uniform, spherical mass leads to a family
Biggs, James +9 more
core +1 more source
Soft Mechanical‐Electrical Logic Using Liquid Metal‐Filled 3D‐Printed Architectures
Advanced Engineering Materials, EarlyView.We present 3D‐printed soft mechanical–electrical logic elements that use liquid metal–filled silicone tubes actuated by thermoplastic polyurethane/polylactic acid (TPU/PLA) architectures to produce Boolean operations. Complementary normally open and normally closed unit cells perform repeatable binary transitions and can be combined into more complex ...
Christoph Lehmann +2 more
wiley +1 more source
Techno-economic and environmental risk assessment of a turbo-electric distributed propulsion system on a blended wing body aircraft [PDF]
, 2014 Constant rise of air traffic has caused the environmental impacts of aviation to be the subject of an unprecedented scrutiny. Organisations all over the world are setting targets for emission reductions that represent the technological potential for ...
Giakoumakis, Eleftherios
core
Cathodic Cage Plasma Deposition of Nanostructured Cu–Fe–Se Coatings on Poly(methyl Methacrylate)
Advanced Engineering Materials, EarlyView.Nanostructured Cu–Fe–Se coatings are deposited on PMMA by a modified cathodic cage plasma process, enabling low‐temperature deposition on polymer substrates. A transition from discontinuous to compact morphology is observed with temperature, with optimal properties at 200°C, where improved CuFeSe2‐type bonding, lowest sheet resistance, and favorable ...
V. S. S. Sobrinho +8 more
wiley +1 more source
Displaced geostationary orbits using hybrid low-thrust propulsion [PDF]
, 2010 In this paper, displaced geostationary orbits using hybrid low-thrust propulsion, a complementary combination of Solar Electric Propulsion (SEP) and solar sailing, are investigated to increase the capacity of the geostationary ring that is starting to ...
Heiligers, J.
core
Numerical study on hydrodynamic behavior of flexible multi-stage propulsion foil
AIP Advances, 2021 To examine mechanisms of the high speed and efficiency of propulsion of aquatic animals and to apply the findings to the design of underwater vehicles, this study uses dolphins as an example. The motion of aquatic animals is divided into three stages for
Dakui Feng +4 more
doaj +1 more source