Results 21 to 30 of about 61,471 (312)

Rocket Solid Propellant Alternative Based on Ammonium Dinitramide [PDF]

open access: yesINCAS Bulletin, 2017
Due to the continuous run for a green environment the current article proposes a new type of solid propellant based on the fairly new synthesized oxidizer, ammonium dinitramide (ADN).
Grigore CICAN, Alexandru-Daniel MITRACHE
doaj   +1 more source

Thermochemistry of Combustion in Polyvinyl Alcohol + Hydroxylammonium Nitrate

open access: yesAerospace, 2021
A mixture of polyvinyl alcohol (PVA) and hydroxylammoniun nitrate (HAN) forms a gummy solid known as a plastisol, which is ionically conducting. When an electrostatic potential of 200 V DC is applied across the plastisol, it ignites.
James K. Baird, Robert A. Frederick
doaj   +1 more source

Optimization of Factors Affecting the Synthesis of Polypropylene Glycol/Polyglycidyl Nitrate/ Polypropylene Glycol Triblock Copolymer and Evaluation of Its Thermal Properties [PDF]

open access: yesعلوم و تکنولوژی پلیمر, 2020
Hypothesis: Polyglycidyl nitrate (PGN) is used in the manufacture of propellant elastomers due to its properties such as highly energetic composition, high density, high oxygen balance, high explosion enthalpy and suitable compatibility with other ...
Tayebe Khanlari   +2 more
doaj   +1 more source

CFD Analysis of De Laval Nozzle of a Hybrid Rocket Engine [PDF]

open access: yesE3S Web of Conferences
: The study gives a general overview of the CFD-simulated gas flow via the nozzle of a De Laval rocket engine. In CFD software, the mesh is generated using the nozzle’s geometry.
Ahmad Mohamed Tarmizi   +6 more
doaj   +1 more source

Optimizing ideal ion propulsion systems depending on the nature of the propellant [PDF]

open access: yesINCAS Bulletin, 2016
From all accounts the ion thrusters are characterized by the fact that they produce a very high exhaust velocity and specific impulse, sometimes too high for many missions.
Grigore CICAN, Ionut-Florian POPA
doaj   +1 more source

A Viscometric study of mixtures with Hydroxyl-terminated polybutadiene (HTPB) and short chain diols used in the formulations of solid composite propellants

open access: yesAnais da Academia Brasileira de Ciências, 2021
Hydroxyl-terminated polybutadiene (HTPB) is widely used in the formulations of solid propellants used in rocket motors. Furthermore, in general, chain extenders and short chain diols, such as 1,4-butanediol and 1,2-propanediol, can also be used in ...
BRUNO C.C. DA CUNHA   +2 more
doaj   +1 more source

High-nitrogen azotetrazole based pyrogen gas generating propellants: Aspects on synthesis, characterization, combustion characteristics and kinetics

open access: yesFirePhysChem
Propellant formulations containing a novel high nitrogen azotetrazole salt viz., diammonium 5,5′-azotetrazolate (DAAzT) along with two different binders viz., hydroxyl terminated polybutadiene (HTPB) and glycidyl azide polymer (GAP) were realized as ...
Santhosh G   +4 more
doaj   +1 more source

Experimental and Theoretical Determination of Water-Jet Velocity for Disruptor Application Using High Speed Videography [PDF]

open access: yesProblemy Mechatroniki, 2019
Experimental and theoretical determination of water-jet velocity using high speed videography for disruptor application is reported in this paper. Water-jet disruptor extensively uses the water as a liquid projectile.
Bhupesh Ambadas PARATE   +3 more
doaj   +1 more source

Solid propellant burn rate characterization: Effect of copper chromite blend with oxidiser and its storage

open access: yesFirePhysChem
This work details the study conducted on composite solid propellants with activated copper chromite (ACR) as burn catalyst for its burn rate change with time due to the interaction of ammonium perchlorate (AP) with ACR.
Sathiskumar PS   +3 more
doaj   +1 more source

Research on aging behavior and safe storage life prediction of modified double base propellant

open access: yesHigh Temperature Materials and Processes, 2022
In order to study the long-time safe storage performance of GaTo modified double base propellant, the accelerated aging tests at 65, 70, 75, and 85°C were conducted.
Gu Yan   +4 more
doaj   +1 more source

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