Design and CFD analysis of an axisymmetric supersonic plug nozzle for an air-air ejector

The air-air ejectors in conjunction with a rotary vacuum pump are used to create and maintain vacuum in sealed chamber for technological purposes. This system can partially decrease the value of the produced vacuum and eliminate the cavitation phenomenon due to the higher inlet pressure present on t...

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Bibliographic Details
Main Authors: Fuszko, Zoltán, Olšiak, Róbert
Format: Conference Proceeding
Language:English
Subjects:
Cavitation
Ejection
Ejectors
Inlet pressure
Kinetic energy
Nozzles
Plug nozzles
Simulation
Suction
Vacuum pumps
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Summary:The air-air ejectors in conjunction with a rotary vacuum pump are used to create and maintain vacuum in sealed chamber for technological purposes. This system can partially decrease the value of the produced vacuum and eliminate the cavitation phenomenon due to the higher inlet pressure present on the suction throat of the vacuum pump [1]. The main working principle of any kind of ejector is the transfer of the kinetic energy conserved in the primary medium, which is made by the interchange of momentum to the driven secondary medium. Because of the low density of the used gases is the increase of kinetic energy possible only with a nozzle, which has the highest outlet velocity without the change of inlet parameters. This paper presents an automatable design and CFD simulation method for axisymmetric plug nozzles.
ISSN:0094-243X
1551-7616
DOI:10.1063/1.4963055