The effect of nozzle diameter, injection pressure and ambient temperature on spray characteristics in diesel engine

15th Asian Congress of Fluid Mechanics

物理学;力学

Andsaler, Adiba Rhaodah^1 ; Khalid, Amir^1 ; Adila Abdullah, Nor Sharifhatul^1 ; Sapit, Azwan^1 ; Jaat, Norrizam^1

Combustion Research Group (CRG), Centre for Energy and Industrial Environment Studies (CEIES), Faculty of Mechanical Engineering, Manufacturing Universiti Tun Hussein Onn Malaysia, Johor, Batu Pahat, Malaysia^1

关键词: Droplet diameters;    High injection pressures;    Injection pressures;    Nozzle diameter;    Penetration length;    Spray characteristics;    Temperature conditions;    Transient simulation;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/822/1/012039/pdf
DOI  :  10.1088/1742-6596/822/1/012039

学科分类：力学，机械学

来源: IOP

【 摘 要 】

Mixture formation of the ignition process is a key element in the diesel combustion as it influences the combustion process and exhaust emission. Aim of this study is to elucidate the effects of nozzle diameter, injection pressure and ambient temperature to the formation of spray. This study investigated diesel formation spray using Computational Fluid Dynamics. Multiphase volume of fluid (VOF) behaviour in the chamber are determined by means of transient simulation, Eulerian of two phases is used for implementation of mixing fuel and air. The detail behaviour of spray droplet diameter, spray penetration and spray breakup length was visualised using the ANSYS 16.1. This simulation was done in different nozzle diameter 0.12 mm and 0.2 mm performed at the ambient temperature 500 K and 700 K with different injection pressure 40 MPa, 70 MPa and 140 MPa. Results show that high pressure influence droplet diameter become smaller and the penetration length longer with the high injection pressure apply. Smaller nozzle diameter gives a shorter length of the breakup. It is necessary for nozzle diameter and ambient temperature condition to improve the formation of spray. High injection pressure is most effective in improvement of formation spray under higher ambient temperature and smaller nozzle diameter.