Journal of Applied and Computational Mechanics

Analysis of a Jet Pump Performance under Different Primary Nozzle ‎Positions and Inlet Pressures using two Approaches: One Dimensional ‎Analytical Model and Three Dimensional CFD Simulations‎

Document Type : Research Paper

Authors

1 Grupo de Investigación e Innovación Ambiental GIIAM, Po. Box, 050034 Medellín, Colombia‎

2 Facultad de Ingeniería, Institución Universitaria Pascual Bravo, Calle 73 # 73A – 226. 050034 Medellín, Colombia‎

3 Grupo de Investigación e Innovación Ambiental GIIAM, Po. Box, 050034 Medellín, Colombia

4 Semillero de Investigación Ambiental SIA, Po. Box, 050034 Medellín, Colombia

5 Semillero de Investigación Ambiental SIA, Po. Box, 050034 Medellín, Colombia‎

Abstract

A jet pump operates under the Venturi effect, where a fluid enters through a primary nozzle and, when passing through a convergent-divergent nozzle, it reaches supersonic conditions, originating a vacuum pressure in a secondary fluid. Fluid-dynamics simulations of jet pumps are performed here using standard k-ε turbulence model. Numerical results are compared to those obtained with an analytical model previously developed, concluding that both approaches predict a similar behavior of Match number, fluid pressure and fluid velocity. A parametric study is done to determine the influence of inlet pressure and primary nozzle position in jet pump performance, Mach number field and total pressure profile. Both parameters have an important influence in those variables, but this is not monotonic in all cases.

Keywords

Main Subjects

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Journal of Applied and Computational Mechanics
Volume 6, Special Issue
December 2020
Pages 1228-1244