Results 91 to 100 of about 9,673 (305)

Thermal Decomposition of Hydrazines from Reactive Dynamics Using the ReaxFF Reactive Force Field [PDF]

, 2009
We report reactive dynamics (RD) studies on: the decomposition of bulk hydrazine (N_2H_4); the decomposition of bulk monomethyl-hydrazine (CH_3N_2H_3), hereafter referred to simply as methyl-hydrazine; the decomposition of hydrazine in the presence of ...
Goddard, William A., III, van Duin, Adri C. T., Zhang, Luzheng, Zybin, Sergey V.   +3 more
core   +2 more sources

Fully 3D‐Printed Wave‐Wound Electromagnetic Motors

Advanced Materials Technologies, EarlyView.
This work presents the first fully 3D‐printed wave‐wound electromagnetic motors, which are created using conductive nanoparticle inks, carbon‐filled nylon polymers, and surface mount components. These motors can achieve a stall torque of 7.62N·mmA−1$7.62 \nobreakspace N{\cdot }mm A^{-1}$ and efficiency of 28.2 %, which approaches the performance of ...
Joseph Schwalbe, Sebastian Mettes, Eduardo Francke, Kenneth W. Allen, Yi Chen Mazumdar   +4 more
wiley   +1 more source

Surface modification of ammonium nitrate by coating with surfactant materials to reduce hygroscopicity

Defence Technology, 2019
Ammonium nitrate (AN) is promising oxidizer in green propellants. In this work, the physical coating method was improved to modify the surface of ammonium nitrate particles with different surfactant materials to reduce hygroscopicity.
Baha I. Elzaki, Yue Jun Zhang
doaj   +1 more source

Self-Propelled Multi Tiller for Green Farming

International Journal of Scientific Research in Engineering and Management
Here, the design and performance analysis of a self-driven multi-tiller for small-scale and eco-friendly agriculture is described. The proposed system is designed to run on an electric power source with a voltage of 12V, utilizing multiple DC motors for both propulsion and tilling action.
Prof. Athith D, Prashanth B, T M Srikanth, Gautham M, Madhusudhan K S   +4 more
openaire   +1 more source

Magnetic Droplet Manipulation on Open Surfaces

Advanced Materials Technologies, EarlyView.
Recent advances in the manipulation of magnetic droplets demonstrate various manipulations on open surfaces, including transport, splitting, merging, and force‐controlled motion, enabled by magnetic particles and external fields. ABSTRACT Manipulation of liquids on a smaller scale enables applications in various fields, particularly diagnostics and ...
Robab Jahangir, Vahid Nasirimarekani
wiley   +1 more source

Predesign of a Radial Inflow Turbine That Uses Supercritical Methane for a Mid-Scale Thruster for Upper Stage Application

Aerospace
The worldwide concern regarding the harmful effects of old polluting and toxic propellants has led to increased interest in new, green propellants and higher efficiency thrusters.
Alexandru-Claudiu Cancescu, Daniel-Eugeniu Crunteanu, Anna-Maria Theodora Andreescu, Simona-Nicoleta Danescu   +3 more
doaj   +1 more source

Green Application for Space Power [PDF]

Most space vehicle auxiliary power units (APUs) use hydrazine propellant for generating power. Hydrazine is a toxic, hazardous fuel that requires special safety equipment and processes for handling and loading. In recent years, there has been development
Robinson, Joel
core   +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, Eswaran Murugasen, Jose G. Martinez, Edwin W. H. Jager   +3 more
wiley   +1 more source

Auto-ignition of ionic liquid fuels with hydrogen peroxide triggered by copper-containing liquid promoter

Energetic Materials Frontiers
Research into next-generation propellants with green fuel–oxidizer pairs to replace the currently used highly toxic hydrazine–N2O4 system has attracted widespread attention. Ionic liquids (ILs) and hydrogen peroxide have demonstrated their feasibility as
Si-cheng Liao, Tian-lin Liu, Zhi-yu Zhou, Kang-cai Wang, Qing-hua Zhang   +4 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, Zihan Li, Yifeng Shao, Jinhao Liu, Li Yu, Shuguang Li   +5 more
wiley   +1 more source