Results 21 to 30 of about 32,331 (292)

Simulation of gelled propellant doughs isothermal flow through extrusion dies using finite difference method [PDF]

, 2017
During the ram extrusion of gelled propellants, the possible flow instabilities can affect the extruded propellant quality. The numerical modelling helps to enhance the geometry of extrusion die, by minimizing the product distortion caused by material ...
Faura Mateu, Félix, Franco Chumillas, Patricio, López García, Pedro José, Martínez Pastor, Juan, Moratilla Fernández, Domingo   +4 more
core   +2 more sources

An Experimental Study on the Large-Volume Liquid Hydrogen Release in an Open Space

Applied Sciences
Liquid hydrogen is one of the high-quality energy carriers, but a large leak of liquid hydrogen can pose significant safety risks. Understanding its diffusion law after accidental leakage is an important issue for the safe utilization of hydrogen energy.
Zhao Zhang, Gang Lei, Ruofan Sun, Liang Pu, Tianxiang Wang, Wei Dong, Qiang Chen, Qiufan Wei, Mu Liu, Yongchen He, Zhi Zheng, Shengqi Zhang   +11 more
doaj   +1 more source

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

FirePhysChem
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, J. Anju, Supriya N, Sreejith M, Suraj S   +4 more
doaj   +1 more source

Investigation on the foaming behaviors of NC-based gun propellants

Defence Technology, 2014
To prepare the porous NC-based (nitrocellulose-based) gun propellants, the batch foaming process of using supercritical CO2 as the physical blowing agent is used.
Yu-xiang Li, Wei-tao Yang, San-jiu Ying
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

Correlation between solid propellant failure and interface debonding in solid rocket motors

Polymer Testing, 2022
In the traditional integrity analysis of solid rocket motors, solid propellants failure and propellant-liner interface debonding were intentionally differentiated. This empirical distinction of failure regions based on the macroscopic phenomenon neglects
Ming Lei, Shuailong Ren, Erhao Chen, Zhenguo Zhang, Jinyou Xiao, Lihua Wen, Xiao Hou   +6 more
doaj   +1 more source

Extended temperature range rocket injector [PDF]

, 1991
A rocket injector is provided with multiple sets of manifolds for supplying propellants to injector elements. Sensors transmit the temperatures of the propellants to a suitable controller which is operably connnected to valves between these manifolds and
Schneider, Steven J.
core   +1 more source

Peroxidasin enables melanoma immune escape by inhibiting natural killer cell cytotoxicity

Molecular Oncology, EarlyView.
Peroxidasin (PXDN) is secreted by melanoma cells and binds the NK cell receptor NKG2D, thereby suppressing NK cell activation and cytotoxicity. PXDN depletion restores NKG2D signaling and enables effective NK cell–mediated melanoma killing. These findings identify PXDN as a previously unrecognized immune evasion factor and a potential target to improve
Hsu‐Min Sung, David Bickel, Lena C. M. Krause, Daria Ezeriņa, Christian Ickes, Julian Wojtachnia, Christine S. Gibhardt, Magdalena Shumanska, Khadija Wahni, Andrea Paluschkiwitz, Julia Malo Pueyo, Ekaterina Baranova, Wim Vranken, Hedwig Stanisz, Ioana Stejerean‐Todoran, Michael P. Schön, Joris Messens, Ivan Bogeski   +17 more
wiley   +1 more source

The Study of HEMs Based on the Mechanically Activated Intermetallic Al₁₂Mg₁₇ Powder

Molecules, 2020
In this work, Al–Mg intermetallic powders were characterized and obtained by melting, casting into a steel chill and subsequent mechanical activation in a planetary mill. The method for producing Al12Mg17 intermetallic powder is presented. The dispersity,
Sergei Sokolov, Alexander Vorozhtsov, Vladimir Arkhipov, Ilya Zhukov   +3 more
doaj   +1 more source

Evolutionarily divergent DUF4465 domains have a common vitamin B12‐binding function

FEBS Open Bio, EarlyView.
We show that DUF4465 family proteins, widespread across bacteria from gut microbiomes, hydrothermal vents, and soil, share a common vitamin B12‐binding function. These augmented β‐jellyroll proteins bind vitamin B12 via extended loops. Our findings establish sequence‐diverse DUF4465 proteins as a widespread class of B12‐binding proteins, highlighting ...
Charlea Clarke, Michal Banasik, Rokas Juodeikis, Martin J. Warren, Richard W. Pickersgill   +4 more
wiley   +1 more source