Numerical Study on the Effect of an Annulus Injector on the Hydrodynamic Behavior of a Spray
| Autor: | Seyed Esmail Razavi, M. T. Shervani-Tabar, R. Esmaelnajad, M. Jafari |
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| Rok vydání: | 2018 |
| Předmět: |
Materials science
lcsh:Mechanical engineering and machinery 020209 energy Mechanical Engineering 02 engineering and technology Injector Mechanics Condensed Matter Physics law.invention Physics::Fluid Dynamics Mechanics of Materials law 0202 electrical engineering electronic engineering information engineering Annulus (firestop) Physics::Accelerator Physics lcsh:TJ1-1570 Annulus conical injector CFD AVL Fire Spray Homogenous distribution of droplets Physics::Chemical Physics Physics::Atmospheric and Oceanic Physics |
| Zdroj: | Journal of Applied Fluid Mechanics, Vol 11, Iss 4, Pp 983-994 (2018) |
| ISSN: | 1735-3645 1735-3572 |
| DOI: | 10.29252/jafm.11.04.28040 |
| Popis: | In the internal combustion engines geometry of the injector orifice has significant effect on the improving of the fuel spray characteristics. In the present paper, effect of a conical annulus injector with three different aspect ratios and three different divergence angles of the annulus orifice on the hydrodynamic behavior of a fuel spray have been investigated numerically. The conical annulus injector aspect ratio is the ratio of the height of the annulus cone to the diameter of its circular base. The geometry of the annulus conical injectors inspires this idea that this type of injectors could inject possible large amount of liquid fuel into a combustion chamber symmetrically and homogeneously. The CFD software AVL Fire has been employed for numerical simulation of diesel fuel spray evolution. Numerical results show that the annulus conical injectors inject liquid fuel with an approximately homogenous distribution of droplets in the combustion chamber in comparison with the conventional injectors. In this kind of injector, fuel has been uniformly distributed in the cylinder. Numerical results also show that the annulus injectors significantly increase the cone angle of the liquid fuel spray and decrease its penetration length. |
| Databáze: | OpenAIRE |
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