Results 21 to 30 of about 9,407 (294)
Numerical simulation of a supersonic ejector for vacuum generation with explicit and implicit solver in openfoam [PDF]
, 2019 Supersonic ejectors are used extensively in all kind of applications: compression of refrigerants in cooling systems, pumping of volatile fluids or in vacuum generation. In vacuum generation, also known as zero-secondary flow, the ejector has a transient
Camacho, Sergi +4 more
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Performance Prediction of Compressible Two-Phase Flow through Ejectors [PDF]
ERJ. Engineering Research Journal, 2015 The objective of present work is to investigate theoretically the performance of two-phase flow (gas-liquid) through ejectors. The numerical investigation is based on non-homogeneous, (liquid and vapor velocities are not equal), non-equilibrium (liquid and vapor temperatures are not equal),two-fluid model, (Eulerian-Eulerian), conservation equations ...
N.I.I Hewedy +3 more
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An Object-Oriented R744 Two-Phase Ejector Reduced-Order Model for Dynamic Simulations
Energies, 2019 The object-oriented two-phase ejector hybrid reduced-order model (ROM) was developed for dynamic simulation of the R744 refrigeration system. OpenModelica software was used to evaluate the system’s performance. Moreover, the hybrid ROM results were
Michal Haida +6 more
doaj +1 more source
International Journal of Advanced Nuclear Reactor Design and Technology, 2020 When injectors are used in petroleum industries or sea water desalination system, it is a special case that the induced gas is accompanied by water, the ejector is in two-phase operation. In the present study, the ejector performance at two phase flow is
WeiXiong Chen +5 more
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Mechanical Engineering Journal, 2016 Recently, with the appearance of the two-phase flow ejector in refrigeration air conditioning and heat pump systems, the efficiency of the cycle has largely been improved in comparison with that of conventional cooling and heating systems.
Yosuke KAWAMURA, Masafumi NAKAGAWA
doaj +1 more source
Energies, 2020 A two-phase flow ejector is an important part of a water mist fire suppression system, and these devices have become a popular research topic in recent years. This paper proposes a supersonic ejector that aims to improve the efficiency of water mist fire
Shizhen Li +4 more
doaj +1 more source
Nihon Kikai Gakkai ronbunshu, 2017 Recently, the refrigeration air conditioner and heat pump system using the two-phase flow ejector is beginning to appear, as the efficiency of the ejector cycle is improved largely in comparison with the conventional system. Shock and expansion waves can
Haruyuki NISHIJIMA +3 more
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The Neutron Stars Census [PDF]
, 1999 The paucity of old isolated accreting neutron stars in ROSAT observations is used to derive a lower limit on the mean velocity of neutron stars at birth.
A. Treves +28 more
core +2 more sources
Multidimensional modeling of condensing two-phase ejector flow
International Journal of Refrigeration, 2012 Abstract Condensing ejectors utilize the beneficial thermodynamics of condensation to produce an exiting static pressure that can be in excess of either entering static pressure. The phase change process is driven by both turbulent mixing and interphase heat transfer. Semi-empirical models can be used in conjunction with computational fluid dynamics (
Michael Colarossi +3 more
openaire +2 more sources
Case Studies in Thermal Engineering, 2023 A novel relaxation drift model (RDM) was proposed to simulate the interphase momentum non-equilibrium (slip) inside two-phase work-recovery CO2 ejectors.
Junan Long +5 more
doaj +1 more source