Analysis and Numerical Simulation of Internal Flow of Pressure Swirl Injector

Please enable javascript in your browser.

Ghasemnia, Atefe | 2015

506 Viewed

Type of Document: M.Sc. Thesis
Language: Farsi
Document No: 47472 (45)
University: Sharif University of Technology
Department: Aerospace Engineering
Advisor(s): Morad, Mohammad Reza; Kebriaee, Azadeh
Abstract:
In This thesis, the behavior of flow inside the pressure-swirl atomizers is studied. The pressure-swirl atomizers are widely used in many industrial applications such as fuel injection in gas turbine, internal combustion engine and liquid-fuel rocket, spray drying, spray in firing and agricultural nozzles.The flow simulation inside the pressure-swirl injector deals with many complicated considerations due to air core formation in the axial zone of the injector as well as high tangential and axial velocities in the swirl camber. The ANSYS Fluent commercial program is used for simulations. The two phase flow inside the injector is modeled by volume of fluid method (VOF) using large eddy simulation (LES) turbulence modeling. The regime of the flow inside the injector is not so clear and there are a lot of debates about it; so in this work, it is tried to understand the regime of the flow field by using the results ofthe simulation and doing frequency analysis on fluctuation velocities. As a result, the flowfield inside the pressure-swirl injector in the axial zone have tendency to be laminar, whereas in the swirl chamber tends to be turbulent
Keywords:
Pressure-Swirl Injectors ; Conveying Flow ; Flow Regime ; Turbulence ; Turbulence ; Two Phase Fluid Flow

No TOC