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Effects of nozzle shape on the flow characteristics of premix injector using computational fluid dynamics (CFD)

Yii, Ronny Shi Chin and Amirnordin, Shahrin Hisham and Khalid, Amir (2014) Effects of nozzle shape on the flow characteristics of premix injector using computational fluid dynamics (CFD). In: International Integrated Engineering Summit (IIES 2014), 1-4 December 2014, Universiti Tun Hussein Onn Malaysia, Johor.


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The burner system is a patented, unique, higher-efficiency and fuel-injector system that works with a specially designed oil burner to create ultra-efficient combustion that reduces oil use, greenhouse gases and other harmful emissions. This research shows the injector nozzle geometries play a significant role in flow characteristics, atomization and formation of fuel-air mixture in order to improve combustion performance, and reducesome pollutant products from burner system. The aim of this research is to determine the effects of nozzle hole shape on flowcharacteristics of the premix injector by using CFD. Multiphase of volume of fluid (VOF) cavitating flow inside nozzles are determined by means of steady simulations and Eulerian-Eulerian two-fluid approach is used for performing mixing of Jatropha oil and air. Nozzle flow simulations resulted that cavitation area is strongly dependent on the nozzle hole shape. Conical hole with k-factor of 2 provides higher flow velocity and turbulent kinetic energy compared with conical hole with k-factor of 1.3 and cylindrical hole. The results show that the premix injector nozzle hole shape gives impact to the flowcharacteristics and indirectly affects the emission of the burner system

Item Type: Conference or Workshop Item (Paper)
Uncontrolled Keywords: eulerian multiphase flow; nozzle shapes; nozzle flow; flowcharacteristics; premix injector; cavitation
Subjects: T Technology > TJ Mechanical engineering and machinery > TJ255-265 Heat engines
Divisions: Faculty of Mechanical and Manufacturing Engineering > Department of Plant and Automotive Engineering
Depositing User: Mrs. Nurhayati Ali
Date Deposited: 08 Mar 2015 06:52
Last Modified: 19 May 2015 09:19
URI: http://eprints.uthm.edu.my/id/eprint/6399
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