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Parametric Study of the Pressure Profile in a Nozzle as a Function of Compressible Flow Parameters


Affiliations
1 Department of Mechanical Engineering, DIMER Research Group, Universidad del Atlantico, Barranquilla, Colombia
2 Department of Mechanical Engineering, KAI Research Group, Universidad del Atlantico, Barranquilla, Colombia
3 Department of Chemical Engineering, Sustainable Chemical and Biochemical Processes Research Group, Universidad del Atlantico, Barranquilla, Colombia
 

Background/Objectives: To take into an account the effects of compressibility when studying the flow of any fluid, it is necessary to define a series of additional parameters in the nozzle analysis, which is a complex job to do in a manual strategy, leaving as a suitable option the use of numerical methods programmed in a commercial software (such as MATLAB®). Methods: Variations were made in compressible flow parameters, such as initial pressure and temperature, and the Mach number, to study their influence over the pressure profile of the air inside a nozzle. Findings: The results show a low influence of the temperature over the pressure profile, a medium to high influence from its intake pressure, and a close relationship with the Mach number, getting even higher pressure drops when it only increases a bit. Application: To predict the behavior of the fluid flow through a nozzle, and to establish design and simulation criteria for these, when subjected to a particular application.
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  • Parametric Study of the Pressure Profile in a Nozzle as a Function of Compressible Flow Parameters

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Authors

Jorge Duarte Forero
Department of Mechanical Engineering, DIMER Research Group, Universidad del Atlantico, Barranquilla, Colombia
Guillermo E. Valencia
Department of Mechanical Engineering, KAI Research Group, Universidad del Atlantico, Barranquilla, Colombia
Luis G. Obregon
Department of Chemical Engineering, Sustainable Chemical and Biochemical Processes Research Group, Universidad del Atlantico, Barranquilla, Colombia

Abstract


Background/Objectives: To take into an account the effects of compressibility when studying the flow of any fluid, it is necessary to define a series of additional parameters in the nozzle analysis, which is a complex job to do in a manual strategy, leaving as a suitable option the use of numerical methods programmed in a commercial software (such as MATLAB®). Methods: Variations were made in compressible flow parameters, such as initial pressure and temperature, and the Mach number, to study their influence over the pressure profile of the air inside a nozzle. Findings: The results show a low influence of the temperature over the pressure profile, a medium to high influence from its intake pressure, and a close relationship with the Mach number, getting even higher pressure drops when it only increases a bit. Application: To predict the behavior of the fluid flow through a nozzle, and to establish design and simulation criteria for these, when subjected to a particular application.

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DOI: https://doi.org/10.17485/ijst%2F2018%2Fv11i25%2F129076