Results 41 to 50 of about 39,755 (280)

Research on Solving the Structural Instability of Composite Propellants by Using Non-Ablative Cladding Layers

Aerospace
In a high-temperature test of the gas generator with a free-loading composite propellant, an abnormal jitter appeared in the latter part of the internal ballistic curve, whereas no such abnormality was observed in the low-temperature and normal ...
Gang Zhang, Mingming Zhan, Wen Feng, Youwen Tan, Yang Liu, Weihua Hui   +5 more
doaj   +1 more source

Hydrogen as a Nuclear Thermal Rocket Propellant

Brazilian Journal of Radiation Sciences, 2022
Nuclear Thermal Propulsion (NTP) is a successfully developed technology, though it hasn’t been officially used in the propulsion system of an astronautical mission. It is the technology most likely to make long distance journeys in space possible.
Antonella Lombardi Costa, Pedro Augusto Rezende, João Gabriel Oliveira, Claubia Pereira, José Eduardo Mautone   +4 more
doaj   +1 more source

Physico‐Chemical Understanding of Plasticizers Interaction with P(VDF‐TrFE‐CFE) Electroactive Polymer

Macromolecular Materials and Engineering, EarlyView.
This study explores the effects of DNOP plasticizer on P(VDF‐TrFE‐CFE) terpolymers, revealing a strong synergy between chemical structure and physical properties. High TrFE bringing natural flexibility and CFE enhancing the plasticizer retention through theorized halogen bonds, ultra‐soft, crack‐free films of high permittivity and softness are ...
Colin Lesenne, David Audigier, Jean‐Fabien Capsal   +2 more
wiley   +1 more source

Mechanical properties of HTPB propellants: Recent advances and underlying mechanisms

Energetic Materials Frontiers
Hydroxyl-terminated polybutadiene (HTPB)-based composite solid propellants (CSPs) are widely used in solid rocket motors due to their excellent mechanical properties and low cost.
Wasiullah Qazi, Rui Pu, Yuan Qin, Qi-Long Yan   +3 more
doaj   +1 more source

Preliminary Studies of a Propellant System for the Counterprojectile of an Active Protection System [PDF]

Problemy Mechatroniki, 2017
This paper presents a selection of the deliverables for a research project intended to develop a technology demonstrator for a smart counterprojectile forming part of an active protection system.
Zbigniew SURMA, Mirosław ZAHOR, Przemysław KUPIDURA, Zbigniew Leciejewski   +3 more
doaj   +1 more source

Mass Spectrometry Structural Proteomics Enabled by Limited Proteolysis and Cross‐Linking

Mass Spectrometry Reviews, EarlyView.
ABSTRACT The exploration of protein structure and function stands at the forefront of life science and represents an ever‐expanding focus in the development of proteomics. As mass spectrometry (MS) offers readout of protein conformational changes at both the protein and peptide levels, MS‐based structural proteomics is making significant strides in the
Haiyan Lu, Zexin Zhu, Lauren Fields, Hua Zhang, Lingjun Li   +4 more
wiley   +1 more source

Kinetic Compensation of Barrel Launch Under High‐Speed Solid‐Phase Particulate Impacts

International Journal of Mechanical System Dynamics, EarlyView.
ABSTRACT An accurate launch‐dynamics computational method is critical for barrel weapon service life assessment and multiphase physics field refinement. Given the lack of studies on the solid‐phase buildup behavior at the projectile base, this paper provides an improved method for calculating the launching dynamics under high pressure and high speed ...
Zhiyi He, Guolai Yang, Quanzhao Sun, Shuli Li   +3 more
wiley   +1 more source

Numerical and experimental study on the combustion pressurization and gaseous products of propellant in a combustor

Results in Engineering
Propellant combustion in a combustor offers a promising method for environmentally sound disposal but is limited by insufficient theoretical and experimental research.
Chenzhuo Hao, Xing Lv, Zhibin Sun, Jiangong Zhao, Wen Ao   +4 more
doaj   +1 more source

Comparative Assessment of Energetic Plasticizers Including NFPEG3N3 in a GAP/HMX Formulation: Mechanics, Stability, Combustion, and Performance

Propellants, Explosives, Pyrotechnics, EarlyView.
ABSTRACT We examine the new energetic plasticizer 3‐(2‐(2‐(2‐azidoethoxy)ethoxy)ethoxy)‐4‐nitro‐1,2,5‐oxadiazole (NFPEG3N3), three reference compounds (BDNPA/F, Bu‐NENA, and DNDA‐57), and a plasticizer‐free control in a fixed HMX/GAP composite. NFPEG3N3 provides the strongest low‐temperature properties, yielding the lowest formulation glass transition ...
Patrick Lieber, Uwe Schaller, Thomas M. Klapötke   +2 more
wiley   +1 more source

A Discontinuous Galerkin–Finite Element Method for the Nonlinear Unsteady Burning Rate Responses of Solid Propellants

Aerospace
The unsteady combustion of solid propellants under oscillating environments is the key to understanding the combustion instability inside solid rocket motors. The discontinuous Galerkin–finite element method (DG-FEM) is introduced to provide an efficient
Zhuopu Wang, Kairui Yu, Yuanzhe Liu
doaj   +1 more source