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Showing 1 to 20 of 49 for “"Ejector"”.
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Hybrid thermoelectric-ejector refrigeration system /
[ACCESS RESTRICTED TO THE UNIVERSITY OF MISSOURI AT AUTHOR'S REQUEST.] Progressively, there has been a substantial shift in emphasis with regards to forest governance and management. Forests management policies are directed toward conserving biodiversity and maintaining ecosystem services rather …
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Modeling of mixer-ejector nozzle flows
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 1995.
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A Computational Model for Two-Phase Ejector Flow
… model to simulate two-phase flow in refrigerant ejectors is described. This work is part of an effort to develop the ejector expansion refrigeration cycle, a device which increases performance of a standard vapor compression cycle by replacing the throttling valve with a work-producing ejector. …
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Testing and modeling of a two-phase ejector
The ejector expansion refrigeration cycle is a modified vapor compression cycle in which a two phase ejector is used to recover a portion of the work otherwise lost in the expansion valve. The ejector improves cycle performance by increasing compressor inlet pressure and by lowering the quality of …
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An Experimental Investigation of Ejector Ramjet Performance at Static Conditions
The performance of a methane-fueled ejector ramjet (ERJ) equipped with the Atlantis Intake System (AIS) was tested at static conditions. For static tests with no forward velocity, the AIS ERJ successfully entrained and mixed the stagnant surrounding air to create a stoichiometric mixture of 17.2 …
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Experimental investigation of an ejector as a refrigerant expansion engine
The use of an ejector to improve the performance of a vapor compression refrigeration system was investigated. The ejector harnesses kinetic energy developed during the throttling process and returns it to the compressor in the form of a pressure boost. An ejector was designed taking into account …
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Assessment of Turbulence Modelling for Compressibility Effects in Ejector Ramjet Applications
… a key component of the Atlantis Intake System ejector ramjet. The third-party OpenFOAM compressible flow solver, pimpleCentralFOAM, is used to simulate a Mach 1.25 axisymmetric jet discharging inside a mixing tube and is compared against PIV data. CFD results were found to over-predict the jet …
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Experimental Validation of an Ejector Ramjet Solver at High Entrainment Conditions
… of a quasi-one-dimensional control volume ejector-ramjet solver was performed at various subsonic inlet flow conditions corresponding to high-entrainment ratios. An ejector apparatus was designed to replicate the intake of an ejector-ramjet currently under development. The apparatus was …
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Theoretical and Experimental Analysis of the Constant-Area, Supersonic-Supersonic Ejector
Made available in DSpace on 2014-12-13T19:55:25Z (GMT). No. of bitstreams: 1 7709100.pdf: 4423112 bytes, checksum: 31509dfb35e7f911d8671c28e139c7b0 (MD5) Previous issue date: 1976
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Investigation of liquid-vapor interactions in a constant area condensing ejector.
Thesis (Sc. D.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1967.
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Optimization of a mixer-ejector system for supersonic civilian transport aircraft
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 1998.
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Analytical and experimental investigation of two-phase ejector cycles using low-pressure refrigerants
The standard two-phase ejector cycle has received significant attention in research studies in recent years because of its ability to improve the efficiency of refrigeration cycles. However, there are several alternate two-phase ejector cycles that have been proposed but have received little …
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Aerodynamic Performance of a Flow Controlled Compressor Stator Using an Imbedded Ejector Pump
A high-turning compressor stator with a unique flow control design was developed and tested. Both boundary layer suction and trailing edge blowing developed from a single supplied motive pressure source are employed on the stator. Massflow removed through boundary layer suction is added to the …
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Saturation curve analysis of humidification-dehumidification desalination systems and analysis of reversible ejector performance
… desalination systems are investigated. Secondly, ejector technologies are analyzed as a means of powering desalination systems thermally. Thermal desalination systems offer advantages over membrane technologies in terms of robustness. They are less prone to scaling and fouling and capable of …
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Experimental and numerical investigation of the design and control of vapor-compression systems with integration of two-phase ejectors for performance enhancement through expansion work recovery
The use of ejectors to improve the efficiency and capacity of vapor-compression refrigeration cycles by means of expansion work recovery has received significant attention in the past decade. Research has focused primarily on the design and performance of the ejector and the effect the ejector has …
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System-level two-phase ejector modeling and integration for enhanced cop in heat pump systems
Submission published under a 24 month embargo labeled 'U of I Access', the embargo will last until 2026-05-01
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Experimental and Analytical Investigation of a Two-Phase Ejector Used for Expansion Work Recovery in a Transcritical R744 Air-Conditioning System
… R744 air-conditioning system using a two-phase ejector specifically designed and built for this investigation. The results are compared with that of a conventional system with an expansion valve. For the test conditions considered, the cooling capacity and COP simultaneously improved by up to 8% …
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Vortex control of two-phase refrigerant flow in nozzles and its application in ejector vapor compression cycles
… efficiency, which is important for two-phase ejector cooling cycle performance. It is also less vulnerable to clogging since the flow control is achieved without changing the flow area. Different nozzle flows with initially subcooled R134a were experimentally investigated. The effects of …
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The Giesel ejector: a practical appraisal of its ability to improve the performance of a steam locomotive
An ejector (jet pump) is a continuous flow pump which utilises the kinetic energy in a high velocity fluid stream, to entrain end extract a second fluid from a given location.
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Numerical Examination of Flow Field Characteristics and Fabri Choking of 2D Supersonic Ejectors
… the two-dimensional planar Cal Poly Supersonic Ejector test rig is developed. The purpose of the simulation is to identify the operating conditions which produce the saturated, Fabri choke and Fabri block aerodynamic flow patterns. The effect of primary to secondary stagnation pressure ratio on …
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