Simulation of variant ambient condition and injection pressure on mixture formation of biodiesel spray

Andsaler, Adiba Rhaodah (2017) Simulation of variant ambient condition and injection pressure on mixture formation of biodiesel spray. Masters thesis, Universiti Tun Hussein Onn Malaysia.

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Abstract

The global environmental change and global warming effects have been become a famous issue and also the major interest in the world. The search for higher energy efficiency of industrial scale of rapid compression machine (RCM) to obtain low emission especially Nitrogen Oxides (NOx) has demanded experimental studies that are complemented with Computational Fluid Dynamics (CFD) simulations. The purpose of this study is to simulate the physics flow pattern of mixture formation with tangential velocity between biodiesel and diesel fuel and air in the mixing chamber of RCM, to determine the nozzle flow and spray characteristics for different injection pressure of biodiesel spray to ambient variant conditions on mixture formation and comparing three types of Crude Palm Oil (CPO) biodiesel blends, B5, B10 and B15 with different ambient density on nozzle flow and spray characteristics by using CFD. To this end, an Eulerian-Lagrangian multiphase approach has been used to simulate the spray processes. CFD Fluent is utilized in this study to investigate the spray characteristics of biodiesel fuels. The simulation considered injection of biodiesel in the constant volume chamber of RCM. The boundary condition is set up at different ambient parameter while the other parameters are kept constant. The effect of fuel type, injection pressure and ambient parameter on the spray behaviour such as spray penetration has been studied under the presence of incylinder flow. The spray penetration variation with time for different ambient parameters and also various biodiesel types, shown the fact that all the fuels atomize faster in the presence of higher injection pressures and slightly slower in higher ambient densities. In particular, high injection pressures were predicted to be more necessary for the biodiesel fuels to develop their break-up. The high ambient temperature shorter the ignitions delay. The effects of these different parameters are analyzed into spray characteristics and compared with the experimental results.

Item Type:Thesis (Masters)
Subjects:T Technology > TP Chemical technology > TP315-360 Fuel
ID Code:9890
Deposited By:Mr. Mohammad Shaifulrip Ithnin
Deposited On:27 Mar 2018 12:02
Last Modified:27 Mar 2018 12:02

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