Results 71 to 80 of about 1,871 (299)
AerospaceSolid propellants play a crucial role in various civil, scientific, and defence-related aerospace propulsion applications due to their efficient energy release, high energy density, low fabrication cost, and ease of operation.
Rushikesh Kore, Ashish Vashishtha
doaj +1 more source
Machine Learning Enables Inverse Design of Optically Driven Microscopic Metavehicles
Advanced Optical Materials, EarlyView.Machine‐learning‐based inverse design is used optimize “metavehicles” — flat microparticles based on metagratings that generate a strong lateral optical force from normally incident light. The optimized design exhibits a force efficiency of ∼88% and a measured propulsion speed in water much higher than previously reported, demonstrating that inverse ...
Vasilii Mylnikov +2 more
wiley +1 more source
Green Propellant Landing Demonstration at U.S. Range
, 2016 The Green Propellant Loading Demonstration (GPLD) was conducted December 2015 at Wallops Flight Facility (WFF), leveraging work performed over recent years to bring lower toxicity hydrazine replacement green propellants to flight missions.
Bacha, Caitlin E. +2 more
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State-of-the-art Advances in the Ignition Selay Reduction of N,N-dimethylethanamine
MedžiagotyraPropellant is a core fuel in defense and aerospace applications. However, conventional hydrazine fuel is highly volatile, toxic, and carcinogenic, resulting in huge threats to the human body and environment. N,N-dimethylethanamine (DMAZ) is a green, high-
Minna GAO +5 more
doaj +1 more source
Defence Technology, 2018 Ammonium dinitramide [NH4N(NO2)2, ADN] is considered as a possible replacement for ammonium perchlorate (AP) in nearly all kind of solid rocket propulsions in the coming future. The reason to use ADN instead of AP in solid rocket propulsion is because of
Pratim Kumar
doaj +1 more source
On–Off Switchable Micromotors for Use in Steerable Microvehicles
Advanced Robotics Research, EarlyView.Electrically controllable micromotors and microvehicles are developed by tuning the diffusion of the fuel. Self‐propelled micromotors using bubble propulsion show great promise for miniaturized devices with multiuse purposes such as cargo delivery and sensing. However, there is currently no method to electrically switch the micromotors on or off. Here,
Hugo Severinsson +3 more
wiley +1 more source
Novel and Green Hypergolic Bi- Propellant System for Propulsion Application
, 2021 Some propellants currently used in space propulsion have the disadvantage of being dangerous to humans and the environment. A wellknown example of this are hydrazine and its derivatives which are toxic, corrosive, and carcinogenic.
van Dommelen, Pim (author)
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Combustion Characteristics of HAN-based Green Propellant Assisted with Nanoporous Active Carbons
Eurasian Chemico-Technological Journal, 2017 Combustion of hydroxylammonium nitrate (95 wt.% HAN) ‒ water solution in presence of high specific surface area activated carbons is investigated in a constant-pressure bomb within the pressure range of 1‒6 MPa. The linear burning rate increased for the
M. K. Atamanov +6 more
doaj +1 more source
Information Transmission Strategies for Self‐Organized Robotic Aggregation
Advanced Robotics Research, EarlyView.In this review, we discuss how information transmission influences the neighbor‐based self‐organized aggregation of swarm robots. We focus specifically on local interactions regarding information transfer and categorize previous studies based on the functions of the information exchanged.
Shu Leng +5 more
wiley +1 more source
Nanoaluminium-Water Slurry: A Novel "Green" Propellant for Space Applications
, 2004 International audienceIn the present work, a novel approach to the problem of hydrazine replacement is proposed. Aluminium/water slurries are suggested as potential substitutes for hydrazine. This slurry includes both the fuel (AI) and the oxidizer (H20),
Shafirovich, E +3 more
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