Results 41 to 50 of about 875 (223)

Hybrid Rocket Engines as an Option to Future Application for the Brazilian Space Sector [PDF]

, 2022
The contemporary space transportation industry is based on complex and expensive rocket engines derived from the last century successful space programs of the United States, Russia, and the European Union.
De Araújo, Thiago B., Gelain, Riccardo, Sakay, Danilo, De Morais Bertoldi, Artur Elias, De Gouvêa, Leonardo H.   +4 more
core  

Concordance Between MR Safety Guidance Documents on Conditions for a Safe MR Environment

Journal of Magnetic Resonance Imaging, EarlyView.
ABSTRACT Background Environmental conditions established at facility design, construction, updates, and/or procurement of specialized equipment are the foundation of safe MR practice. Establishing an institutional MR safety program must take into consideration the conditions of the MR environment, and staff training should be tailored to its features ...
Ives R. Levesque, Véronique Fortier, Jorge Campos Pazmiño, Evan McNabb   +3 more
wiley   +1 more source

Throttleable hybrid rocket engines for precise aerospace manoeuvres [PDF]

, 2019
Aim of this bachelor thesis is to describe current knowledge of hybrid rocket propulsion. Thesis describes the development of hybrid rocket engine, including its precise description of the engine.
Kříž, Tomáš
core  

Sounding Rocket "HEROS" - A Low-Cost Hybrid Rocket Technology Demonstrator [PDF]

, 2017
The inherent safety of hybrid rocket propulsion offers some unique advantages com- pared to solid and liquid propellant rocket engines. This makes it especially attractive for space tourism, Micro-launcher and hands-on experiments in the education of ...
Tomilin, K., Hertel, F., Hochheimer, B., Kobald, Mario, Ulrich Fischer, Ferdinand Hertel, Anna Petrarolo, Kysela, P., Benjamin Hochheimer, Jonas Breitinger, Konstantin Tomilin, Christian Schmierer, Pahler, A., Paula Kysela, Schmierer, C., Fischer, U., Jonas Gauger, Petrarolo, Anna, Mario Kobald, Andreas Pahler, Gauger, J., Breitinger, J.   +21 more
core   +1 more source

Analysis of advanced cooling strategies for rocket engines conveying ternary hybrid nanofluids with second slip conditions and melting heat transfer

Case Studies in Thermal Engineering
Effective cooling in rocket engines is essential to prevent overheating and ensure efficient performance under extreme operating conditions. This study presents a comprehensive investigation into advanced cooling strategies for rocket engines utilizing ...
Hatem Gasmi, A.M. Obalalu, Umair Khan, Anuar Ishak, Hami Gündoğdu, Nermeen Abdullah, Samia Elattar, Ahmed M. Galal   +7 more
doaj   +1 more source

Innovative Methods to Enhance the Combustion Properties of Solid Fuels for Hybrid Rocket Propulsion

Aerospace, 2019
The low regression rates for hydroxyl-terminated polybutadiene (HTPB)-based solid fuels and poor mechanical properties for the alternative paraffin-based liquefying fuels make today hybrid rocket engines far from the outstanding accomplishments of solid ...
Suhang Chen, Yue Tang, Wei Zhang, Ruiqi Shen, Hongsheng Yu, Yinghua Ye, Luigi T. DeLuca   +6 more
doaj   +1 more source

Three-Dimensional Numerical Analysis of Longitudinal Thermoacoustic Instability in a Single-Element Rocket Combustor

Frontiers in Energy Research, 2022
This study numerically investigated the thermoacoustic combustion instability characteristics of a scaled rocket combustor based on a hybrid of the Reynolds-averaged Navier–Stokes and large–eddy simulation method.
Guo Kangkang, Xu Boqi, Ren Yongjie, Tong Yiheng, Nie Wansheng   +4 more
doaj   +1 more source

NUMERICAL MODELING OF COMBUSTION PROCESSES IN HYBRID ROCKET ENGINES

International Journal of Energetic Materials and Chemical Propulsion, 2016
Nowadays, numerical simulations of combustion processes in hybrid rockets are generally considered as a qualitative tool used mainly to describe the flow field inside the rocket engine. A research effort is of major importance in order to change this trend.
Mazzetti, Alessandro, BARBANTE, PAOLO FRANCESCO   +1 more
openaire   +2 more sources

First 20 Years of Orbitrap Mass Spectrometry as the Mainstream Analytical Technique

Mass Spectrometry Reviews, EarlyView.
ABSTRACT This review traces the first 20 years of Orbitrap mass spectrometry as a mainstream high‑resolution and accurate‑mass (HR/AM) technology. It outlines the historical development of the Orbitrap analyzer, the evolution of major instrument families, and the key technological innovations that enabled its widespread adoption. Particular emphasis is
Alexander Makarov
wiley   +1 more source

Screening Surface Modifications to Benzene to Improve Solubility in Hydroxyl‐Terminated Polybutadiene (HTPB)—A DFT Demonstration

Propellants, Explosives, Pyrotechnics, EarlyView.
ABSTRACT The objective of this paper is to demonstrate the advantage of computationally pre‐screening surface‐modifying material candidates, using density functional theory (DFT), to inform experimental synthesis and formulation efforts. This demonstration focuses on improving the solubility of benzene‐based materials in hydroxyl‐terminated ...
Samantha E. Knoth
wiley   +1 more source