Results 21 to 30 of about 9,918 (348)

Polyurethanes Based on Environmentally Friendly Polyols as a Promising Alternative to HTPB Binder for Composite Propellant Rockets

Proceedings, 2023
Composite propellants used in solid-fuel rockets commonly consists of an oxidizer, the most used being ammonium perchlorate, fuels such as powdered aluminum, compounds that control the burn rate (catalysts or inhibitors), and various other additives [...]
Sorin-Viorel Dolana, Anamaria Zaharia, Tanţa-Verona Iordache, Andrei Sârbu, Celina-Maria Damian, Traian Rotariu, Anita-Laura Chiriac, Ana-Mihaela Gavrilă, Anton Ficai   +8 more
doaj   +1 more source

Fabrication of alginate-based microspheres with cellular structure for tuning ammonium dinitramide performance

Defence Technology, 2023
Recently, an emerging category green of energetic material ammonium dinitramide (ADN) has exhibited promising application in propellants due to its outstanding merits in energy release and environmental friendliness.
Dun-ju Wang, Xu Zhou, Yao-feng Mao, Xin Wang, Ye-ming Huang, Rui-hao Wang, Da-wei Zheng   +6 more
doaj   +1 more source

Burn rate of a novel boron-AN-water green solid propellant

FirePhysChem, 2022
A novel composition of green solid rocket propellant has been suggested and examined. Boron powder was chosen to serve as fuel, for its very high energetic potential, which exceeds that of other common metals, as well as that of fossil fuels.
Adi Zamostianu, Yinon Yavor
doaj   +1 more source

An overview on properties, thermal decomposition, and combustion behavior of ADN and ADN based solid propellants

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

Impulse mechanical strength improvement of alumina by surface coating

Cailiao gongcheng
To increase the impulse mechanical strength of alumina, the pore structure of alumina was modified by surface coating. It was found that the impulse mechanical strength of alumina samples coated with aluminum chloride increases from 35 MPa to 51 MPa and ...
CHEN Zhiqiang, LUO Yuhong, LIANG Jinghua, LIU Mengran, WANG Qing, DONG Xiaotian   +5 more
doaj   +1 more source

Initial research on thermal decomposition of 98% concentrated hydrogen peroxide in thruster-like conditions

Engineering Science and Technology, an International Journal, 2022
The current research is focused on investigating the possibility of harnessing the thermal decomposition of highly concentrated Hydrogen Peroxide 98% i.e., utilizing a decomposition process initiated and maintained solely by a temperature source for low ...
Lukasz Mezyk, Zbigniew Gut, Kiran Mohan, Jan Kindracki, Grzegorz Rarata   +4 more
doaj   +1 more source

Green Propellant Loading Demonstration at U.S. Range [PDF]

52nd AIAA/SAE/ASEE Joint Propulsion Conference, 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. The objective of this collaboration between NASA Goddard Space Flight Center (GSFC), WFF, the Swedish National ...
Henry Mulkey, Joseph T. Miller, Caitlin Bacha   +2 more
openaire   +1 more source

Studies on the flame propagation characteristic and thermal hazard of the premixed N2O/fuel mixtures

Defence Technology, 2020
An experimental study was carried out to investigate the flame propagation and thermal hazard of the premixed N2O/fuel mixtures, including NH3, C3H8 and C2H4.
Yu-yan Li, Rong-pei Jiang, Zhi-peng Li, Sen Xu, Feng Pan, Li-feng Xie   +5 more
doaj   +1 more source

Stabilizer selection and formulation strategies for enhanced stability of single base nitrocellulose propellants: A review

Energetic Materials Frontiers
Stabilizers play a crucial role in preventing undesirable decomposition and degradation reactions of propellants, thus ensuring their long-term performance and safe storage.
Siti Nor Ain Rusly, Siti Hasnawati Jamal, Alinda Samsuri, Siti Aminah Mohd Noor, Khoirul Solehah Abdul Rahim   +4 more
doaj   +1 more source

Testing of the N₂O/HDPE Vortex Flow Pancake Hybrid Rocket Engine with Augmented Spark Igniter

Aerospace, 2023
The paper is part of the research aimed at determining if the vortex flow pancake (VFP) hybrid rocket engine is feasible as green in-space chemical propulsion.
Tomasz Palacz, Jacek Cieślik
doaj   +1 more source