8th International Conference on Internal Combustion Engines , 2014-02-17

Title : ( Numerical Analysis of the 3D Flow Field of Pressure Swirl Atomizers with Helical Passages )

Authors: Masoud Yazdimamaghani , Seyyed Mohammad Reza Modarres Razavi ,

Citation: BibTeX | EndNote

Performance of swirl injectors affects the combustion efficiency, pollutant emissions and combustion instabilities in different combustion processes. At high strength of swirling motion in swirling chamber, an air core will be visible inside the atomizer, so a two-phase flow will be present inside the atomizer. In this study the volume-of-fluid (VOF) method is used to simulate the internal flow of pressure swirl atomizers. In order to investigate the effects of swirl generator geometry on flow characteristics of pressure swirl atomizers with helical passages, 10 three-dimensional simulations have been done. Number of helical grooves, swirl angle and helical grooves depth were three geometrical variables that the effects of them have been studied on the atomization characteristics such as spray cone angle and discharge coefficient. The results showed that by increasing the number of helical grooves, swirl angle and helical grooves depth, liquid film thickness increases and the spray cone angle decreases slightly, which implies that two of the flow characteristics have been worsened awhile. However, the discharge coefficient increased exponentially up to 41% while the swirl angle increased from 32.5 to 75 degrees. The results emphasises that the frictional losses should be minimized in atomizers swirl generator manufacturing process.

Keywords

, “Pressure swirl atomizer”, “Volume-of-fluid”, “helical passages”, “Spray cone angle”, “Discharge
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@inproceedings{paperid:1040532,
author = {Yazdimamaghani, Masoud and Modarres Razavi, Seyyed Mohammad Reza},
title = {Numerical Analysis of the 3D Flow Field of Pressure Swirl Atomizers with Helical Passages},
booktitle = {8th International Conference on Internal Combustion Engines},
year = {2014},
location = {Tehran, IRAN},
keywords = {“Pressure swirl atomizer”; “Volume-of-fluid”; “helical passages”; “Spray cone angle”; “Discharge coefficient”},
}

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%0 Conference Proceedings
%T Numerical Analysis of the 3D Flow Field of Pressure Swirl Atomizers with Helical Passages
%A Yazdimamaghani, Masoud
%A Modarres Razavi, Seyyed Mohammad Reza
%J 8th International Conference on Internal Combustion Engines
%D 2014

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