Results 11 to 20 of about 5,519 (211)
Two-Stage Bipolaron Formation in Molecularly Doped Conjugated Polymers. [PDF]
Adv MaterThis work investigates bipolaron formation in 2,3,5,6‐tetrafluoro‐7,7,8,8‐tetracyanoquinodimethane (F4TCNQ)‐doped conjugated polymer P(g32T‐T) films with glycol sidechains at two stages of both low and high doping levels. At the early stage, bipolarons mainly form from double doping, enhancing structural ordering, and carrier transport.
Su R +17 more
europepmc +2 more sources
Parameter Identification of Nonlinear Bearing Stiffness for Turbopump Units of Liquid Rocket Engines Considering Initial Gaps and Axial Preloading [PDF]
Журнал інженерних наук, 2021 This article is devoted to developing a mathematical model of nonlinear bearing supports for turbopump units of liquid rocket engines considering initial gaps and axial preloading.
Verbovyi A. +6 more
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Influence of Rotating Speeds and Thermodynamic Effects on LOX Turbopump Performance
International Journal of Aerospace Engineering, 2023 As a key factor of a reusable turbopump, axial thrust directly determines the reliability of the bears and seals, especially considering the influence of rotational speeds and thermodynamic effects.
Xuebing Bu +3 more
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Experimental study on stability of axial direction of balance piston mechanism (Translated)
Mechanical Engineering Journal, 2023 Vibration problems often occur in development of rocket engine turbopump, and an axial vibration is one of these problems. Rocket turbopumps often use the balance piston mechanism (BP), which is a self-balancing system, to balance the large axial thrust ...
Hiromichi HIRAKI +2 more
doaj +1 more source
Energy Nexus, 2022 This study of Reverse Osmosis plant operation shows the energy efficiency of Energy Recovery Inc. (ERI) is around 98.57 %, while the energy efficiency of Turbo pumps is around 82.5 % Recovered from the rejected water pressure.
Pawan Kumar, Pankaj Gupta, Satish Kumar
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Morphological design considering layout and permutation of the components for rocket turbopump
Nihon Kikai Gakkai ronbunshu, 2016 The rocket engine turbopump is the high-rotational speed and high-power turbomachinery to feed the propellant from the tank to the combustion chamber. Lateral vibration of turbopump rotor is a very serious problem and it has brought about the unplanned ...
Satoshi KAWASAKI +3 more
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Hydrogen Sensing via Heterolytic H<sub>2</sub> Activation at Room Temperature by Atomic Layer Deposited Ceria. [PDF]
ChemSusChemUltrathin atomic layer deposited ceria films (<20 nm) are capable of H2 heterolytic activation at room temperature, undergoing a significant reduction regardless of the absolute pressure, as measured under in‐situ conditions by near ambient pressure X‐ray photoelectron spectroscopy.
Morales C +15 more
europepmc +2 more sources
Panel Discussion on Inducer Design Criteria [PDF]
, 2003 This article reports a panel discussion titled Inducer Design Criteria presented at the 9th International Symposium on Transport Phenomena and Dynamics of Rotating Machinery (ISROMAC-9).
Acosta, Allan J. +2 more
core +3 more sources
Авіаційно-космічна техніка та технологія, 2021 The creation of complex structural elements of aircraft using is promising and is widely used since such elements have several structural and technological advantages over the manufacture of parts using classical technologies.
Юрій Анатолійович Шашко +3 more
doaj +1 more source
The Application of Counter-Rotating Turbine in Rocket Turbopump
International Journal of Rotating Machinery, 2008 Counter rotating turbine offers advantages on weight, volume, efficiency, and maneuverability relative to the conventional turbine because of its special architecture.
Tang Fei, Zhao Xiaolu, Xu Jianzhong
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