Results 1 to 10 of about 822 (213)
Numerical investigation of heat transfer in a CO2 two-phase ejector [PDF]
Energy, 2018 Abstract In this paper, the influence of heat transfer in the walls of an R744 two-phase ejector on ejector performance was investigated. A numerical investigation was performed using a computational fluid dynamic (CFD) model of the R744 two-phase flow coupled with the heat transfer inside the ejector.
Michal Haida +2 more
exaly +4 more sources
Application of ejectors for two-phase flows [PDF]
E3S Web of Conferences, 2021 The article studies the work of a water jet pump (ejector), influence of the mixture characteristics and pipe length on the energy parameters of the ejector system. The relevance of the topic is associated with the active use of ejectors in the modern world in various areas, including in hydraulic structures. Frequent use of ejectors is ensured by high
Volgina Liudmila, Romanova Anastasiia
openaire +2 more sources
Shape optimisation of a two-phase ejector for CO 2 refrigeration systems [PDF]
International Journal of Refrigeration, 2017 The shape optimisation of four CO2 ejectors is presented in this study. The considered ejectors were originally designed for a multi-ejector supermarket CO2 refrigeration system. The objective function was formulated to consider the multiple operating regimes, where the goal of the optimisation was to maximise the device efficiency.
Michal Palacz +4 more
openaire +3 more sources
Performance of Two Phase Ejector in Refrigeration Cycle.
TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series B, 1998 The dissipated effective kinetic energy in the refrigeration cycle can be recovered by using a two phase ejector. The performance of the two phase ejector depends on the mixing characteristics of the droplets with the large inertia and the relatively light gas. It is important for designing the two phase ejector to know characteristics of the two phase
NAKAGAWA, Masafumi +2 more
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Numerical and Experimental Analysis of Two Phase Flow in Ejector
Energy Procedia, 2014 AbstractWhen the ejector was applied in the natural gas exploitation and sea water desalination industries, the ejector always operated on the two phase operation, because of the primary fluid or the induced fluid usually companying some water inside. The water inside the primary and induced gas will affect the ejector performance. In the present study,
Chen, Weixiong +5 more
openaire +1 more source
The hydrodynamics of two-phase flows in the injection part of a conventional ejector [PDF]
International Journal of Multiphase Flow, 2019 Abstract The characteristics of two-phase flow through a ‘conventional’ convergent-nozzle in an entrainment chamber of an ejector apparatus are described in this paper. A unique data set comprising 350 data points was generated in an air-water horizontal test-rig. Two sets of flow conditions were established, the first one including high liquid - low
D. Mifsud, Y. Cao, P.G. Verdin, L. Lao
openaire +3 more sources
Near‐Field Electrospinning Micro‐Printhead Achieves Precise Control of Nanofiber Deposition
Advanced Engineering Materials, EarlyView.A micro‐printhead for near‐field electrospinning enables reproducible deposition of polymer nanofibers with diameters below 50 nm. Systematic parameter studies uncover the mechanisms linking operating conditions to fiber morphology, paving the way for precise and low‐cost nanoscale 3D manufacturing.As a high‐resolution, cost‐effective, and rapid ...
Han Xu, Dario Mager, Jan G. Korvink
wiley +1 more source
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
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
openaire +1 more source
Advanced Engineering Materials, EarlyView.This experimental study investigates the thermodynamic limits of the Al–Mn τ ferromagnetic phase within complex‐composition alloys (CCAs). Using nine rare‐earth‐free compositions, it explores a broad region of the pseudobinary AlMnCoFeNi system. The results reveal intricate links between composition, phase stability, and magnetic behavior, highlighting
Sacha Plagnol‐Chauzu +4 more
wiley +1 more source