Results 11 to 20 of about 9,673 (305)
Aerospace, 2023 Hybrid rocket engines (HREs) offer a low-cost, reliable, and environmentally friendly solution for both launch and in-space applications. Hybrid propellants have been identified as green thanks to their use of non-toxic, non-carcinogenic oxidizers.
Christian Paravan +2 more
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The Role of Thrusters in Space Systems [PDF]
فناوری در مهندسی هوافضا, 2020 Spacecrafts, such as artificial satellites and space probes have small rockets called thrusters for orbital maneuvering, and satellite attitude control. These thrusters produce thrust by exhausting gases from their nozzles.
Sajjad Hosseinzadeh alqoo +1 more
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Recent advances in hypergolic ionic liquids with broad potential for propellant applications
FirePhysChem, 2022 As a promising choice of new-generation green propellant fuels, hypergolic ionic liquids (HILs) have attracted a great deal of interest in recent ten years, illustrated by their applications in the field of space science and exploring outer space.
Yunhe Jin +6 more
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Evaluating New Liquid Storable Bipropellants: Safety and Performance Assessments
Aerospace, 2022 Conventional storable bipropellants make use of hydrazine and its derivatives as fuels and nitrogen tetroxide as an oxidizer. In recent years, the toxicity character of these chemicals pushed the propulsion community towards “green” alternatives. Several
Stefania Carlotti, Filippo Maggi
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Reactor Structure for the Decomposition of ADN-Based Monopropellant
Aerospace, 2023 Ammonia dinitramide (ADN)-based liquid monopropellants are considered to be environmentally friendly alternatives to the toxic and carcinogenic hydrazine-based propellants. Hence, Space Solutions Co., Ltd.
Wonjae Yoon +2 more
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FirePhysChem, 2022 This paper discusses the potential use of hydrogen peroxide as oxidizer for solid rocket propulsion. While hydrogen peroxide is a liquid in normal conditions, it may be used in solid rocket motor grains.
Wioleta Kopacz +5 more
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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 +8 more
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First Principles Study of the Ignition Mechanism for Hypergolic Bipropellants: N,N,N′,N′-Tetramethylethylenediamine (TMEDA) and N,N,N′,N′-Tetramethylmethylenediamine (TMMDA) with Nitric Acid [PDF]
, 2011 We report quantum mechanics calculations (B3LYP flavor of density functional theory) to determine the chemical reaction mechanism underlying the hypergolic reaction of pure HNO_3 with N,N,N′,N′-tetramethylethylenediamine (TMEDA) and N,N,N′,N ...
Dasgupta, Siddharth +3 more
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Kinetic Stability and Propellant Performance of Green Energetic Materials [PDF]
Chemistry – A European Journal, 2010 AbstractA thorough theoretical investigation of four promising green energetic materials is presented. The kinetic stability of the dinitramide, trinitrogen dioxide, pentazole, and oxopentazole anions has been evaluated in the gas phase and in solution by using high‐level ab initio and DFT calculations.
Martin, Rahm, Tore, Brinck
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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 +6 more
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