Results 1 to 10 of about 33,003 (212)

Effect of hexanitroethane (HNE) and hydrazinium nitroformate (HNF) on energy characteristics of composite solid propellants

open access: yesFirePhysChem, 2021
This work deals with energy performance calculate results of new solid composite propellants based on Hexanitroethane (HNE) and Hydrazinium nitroformate (HNF).
Pengcheng Wang
exaly   +3 more sources

Impact of Ethanol on Electrostatic Behaviour of Fluorocarbon Pharmaceutical Propellants [PDF]

open access: yesPharmaceuticals
Background/Objectives: Triboelectrification in fluid systems, and specifically in hydrofluorocarbon (HFC)-based propellants, used in pressurised metered-dose inhalers (pMDIs) remains understudied despite its impact on aerosol behaviour and does delivery.
Lochana Ranatunge   +3 more
doaj   +2 more sources

Effect of aging process on combustion and mechanical performance of nitroguanidine propellants [PDF]

open access: yesE3S Web of Conferences, 2021
The effect of different aging times (1 day, 3 days, 5 days and 7 days) on the combustion performance and mechanical properties of nitroguanidine propellants was studied.Through the mechanical properties test of impact and compression and closed bomb test
Wang Peng, Liu Zhitao, Guo Hao, Liao Xin
doaj   +1 more source

Modeling and Analysis of the Flow Characteristics of Liquid Hydrogen in a Pipe Suffering from External Transient Impact

open access: yesEnergies, 2022
Pipes can be subjected to external transient impacts such as accidental collision, which affects the safe operation of storage and transportation systems for liquid hydrogen. Fluid–structure coupling calculation for a pipe under external transient impact
Yuanliang Liu   +3 more
doaj   +1 more source

SOLID PROPELLANTS [PDF]

open access: yesRubber Chemistry and Technology, 2019
ABSTRACT Solid propellants are energetic materials used to launch and propel rockets and missiles. Although their history dates to the use of black powder more than two millennia ago, greater performance demands and the need for “insensitive munitions” that are resistant to accidental ignition have driven much research and development over the ...
Mason, B.P., Roland, C.M.
openaire   +3 more sources

THE PROPELLER AND THE FROG [PDF]

open access: yesThe Astrophysical Journal, 2010
"Propellers" in planetary rings are disturbances in ring material excited by moonlets that open only partial gaps. We describe a new type of co-orbital resonance that can explain the observed non-Keplerian motions of propellers. The resonance is between the moonlet underlying the propeller, and co-orbiting ring particles downstream of the moonlet where
Pan, Margaret, Chiang, Eugene
openaire   +2 more sources

NON-DETONATING CHARGES IN POLYMER HOUSINGS FOR SMOOTH SPLITTING OF ROCK BLOCKS DURING PRIMARY EXTRACTION AND SECONDARY CUTTING [PDF]

open access: yesSustainable Extraction and Processing of Raw Materials Journal, 2020
. In some cases, during the extraction of certain mineral resources, industrial explosives are not sufficiently safe for the environment in terms of generated shock waves, toxic gases, seismic waves, scattering and vibrations.
Nadezhda Stoycheva, Petar Shishkov
doaj   +1 more source

Measurement of thermal expansions of closed-cell polyurethane rigid foams at cryogenic temperatures with an extensometer technique

open access: yesAIP Advances, 2021
The database of thermal expansion behavior of closed-cell polyurethane rigid foam at very low temperatures is required for designing and manufacturing thermal insulation components of various cryogenic systems.
Hongyu Dong   +5 more
doaj   +1 more source

Nitration of Chitin Monomer: From Glucosamine to Energetic Compound

open access: yesMolecules, 2021
The nitration of chitin monomer in a mixture of nitric acid and acetic anhydride was conducted and a highly nitrated (3R,4R,6R)-3-acetamido-6-((nitrooxy)methyl)tetrahydro-2H-pyran-2,4,5-triyl trinitrate (1) was obtained.
Hui Dou   +6 more
doaj   +1 more source

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