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A comparison between the fractal and swirl injector of diesel spray characteristics in the burner system

Yii, Ronny Shi Chin and Khalid, Amir and Abd Ghani, Abd Malek and Mohamed Issak, Mahad and Amirnordin, Shahrin Hisham (2015) A comparison between the fractal and swirl injector of diesel spray characteristics in the burner system. In: International Engineering Research and Innovation Symposium 2015 (IRIS), 12–13 September 2015, Putrajaya, Malaysia.


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Low energy use to produce high power technique is demanding by many industries in order to achieve the economical expenses. Cost and energy still a problematic area for the burner combustion for many industries in the world. Besides, combustion process is a main key point for the performance of burner. Well mixture formation for a spray could achieve the wonderful combustion during the burning process. The main purpose of this research is to investigate the performance of turbulence generators (swirler and fractal grids) to the spray characteristics while related to the prediction of combustion process. The studied parameters include equivalent ratio from lean, stoichiometric and rich, in diesel-air mixture formation and spray characteristics such as spray penetration length, spray angle and spray area. The spray images of different equivalence ratio are taken by the direct photography method with a digital camera. The real spray images with the time changes was analyzed by the image processing technique and the swirler and two types of fractal grids (fractal regular grid and fractal grid) are taken into account of comparison with the based diesel fuel. The result showed that the swirler can easily control the penetration length of the spray from preventing contact to the wall of combustor chamber and it is predicted that the combustion will be more complete due to its short primary spray breakup and reduce the emission produce. Nevertheless, fractal grids have been proven that generated high turbulence intensity with increased the spray penetration length and spray area in this experiment and it is predicted to produce high burning velocity than swirler during the combustion process. Application of fractal grid in burner system could produce high power of combustion with lower energy used. However, the emission produced predicted will be slightly higher. Keywords: Turbulence generators Swirler Fractal grids Diesel fuel Burner system

Item Type: Conference or Workshop Item (Paper)
Uncontrolled Keywords: turbulence generators; swirler; fractal grids; diesel fuel; burner system; spray characteristics; performance
Subjects: T Technology > TJ Mechanical engineering and machinery > TJ255-265 Heat engines
Divisions: Faculty of Mechanical and Manufacturing Engineering > Department of Energy and Thermofluid Engineering
Depositing User: Normajihan Abd. Rahman
Date Deposited: 19 Oct 2015 00:43
Last Modified: 19 Oct 2015 00:43
URI: http://eprints.uthm.edu.my/id/eprint/7306
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