Results 21 to 30 of about 863,762 (375)
Robustness of Cryogenic Hybrid Journal Bearings
Tribology Online, 2012 In the present study, a nine-recess hybrid journal bearing (HJB) having a Young Leaf Mark recess was operated at a rotational speed of up to 75,000 rpm using the cryogenic journal bearing test apparatus at JAXA, to clarify an onset speed of the rotor ...
Mamoru Oike +4 more
doaj +1 more source
Applied Sciences, 2022 This paper compares various optimization techniques and objective functions to obtain optimum rocket engine performances. This research proposes a modular optimization framework that provides an optimum design for Gas Generator (GG) and Staged Combustion
Suniya Sadullah Khan +5 more
doaj +1 more source
CD8+ T cell memory is sustained in mice by hepatic stellate cells
Hepatology, EarlyView., 2022 HSC role in memory CD8+ T cell maintenance. Abstract Background and Aims Long‐lasting immunological memory is the ultimate goal of vaccination. Homeostatic maintenance of memory CD8+ cytotoxic T cells (MemCD8TCs) is thought to be mediated by IL‐15/IL‐15R heterodimer (15HD)‐expressing myeloid cells.
Yi‐Ting Chen +4 more
wiley +1 more source
Авіаційно-космічна техніка та технологія, 2018 The subject matter of the article is an analysis of methods for assessing the reliability of a complex technical system applicable to a rocket engine for solving the problem of estimating the reliability of a rocket engine at an early stage of its ...
Володимир Олексійович Габрінець +1 more
doaj +1 more source
Rotating Detonation Rocket Engine Operability Under Varied Pressure Drop Injection
, 2020 Rotating detonation rocket engine (RDRE) experiments have so far been limited to injectors with high pressure drop to limit injector–plenum coupling.
Blaine Bigler +3 more
semanticscholar +1 more source
A Study on Dynamic Characteristics of Thin-Walled Cylindrical Cavities with a Large Aspect Ratio
Aerospace, 2022 The unstable combustion problem in small-sized solid rocket engines with a large aspect ratio is so complicated that its causes remain unclear. In this study, the coupled vibration between the sound field and shell in the engines was proposed as a ...
Fangfang Xu, Hong Li, Dongxu Zhang
doaj +1 more source
Investigations on Internal Ballistic Characteristics of Pasty Propellant Rocket Engine
International Journal of Aerospace Engineering, 2021 Pasty rocket engines have broad application prospects in the aerospace field. To study the internal ballistic characteristics of the pasty propellant rocket engine, the burning surface change model of pasty propellant was built.
Xinyou Shan +5 more
doaj +1 more source
Xibei Gongye Daxue Xuebao, 2021 This paper established the three-dimensional edge-based smoothed finite element method(ES-FEM) based on polyhedral mesh, divided the smoothed domain, constructed the shape function and derived the geometric matrix and the stiffness matrix.
doaj +1 more source
Effect of Secondary Combustion on Thrust Regulation of Gas Generator Cycle Rocket Engine
Applied Sciences, 2022 Thrust regulation is applied to maintain the performance of the liquid propellant rocket engine. The thrust level of a rocket engine can be readily controlled by adjusting the number of propellants introduced into the combustion chamber. In this study, a
Sohaib Khan +4 more
doaj +1 more source
Dynamic behavior of intermittent combustion oscillations in a model rocket engine combustor
, 2020 We experimentally study the dynamic behavior of intermittent combustion oscillations by time series analysis in terms of nonlinear forecasting, symbolic dynamics, and statistical complexity, including the detection of the change in dynamical state based ...
C. Aoki +3 more
semanticscholar +1 more source