Effects of guide vane swirl and tumble device (GVSTD) to the air flow of naturally aspirated CI engine
Date
2011
Authors
Saad, I.
Bari, S.
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Conference paper
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Proceedings of the 9th International Conference on Mechanical Engineering (ICME2011), 2011, pp.1-6
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9th International Conference on Mechanical Engineering (ICME2011) (18 Dec 2011 - 20 Dec 2011 : Dhaka, Bangladesh)
Abstract
Current trend shows that biodiesel has a high potential as an alternative fuel for internal combustion engines to support depleting petroleum based fuel resources. However, the viscosity of biodiesel is heavier as compared to diesel fuel and gives a problem of low atomization, resulting in lower performance of the engine. In this paper, a set of vanes, named Guide Vane Swirl and Tumble Device (GVSTD), are added into the air intake system to create controlled turbulence to improve the atomization of biodiesel. To observe these phenomena, a simplified in-cylinder simulation model consists of fluids, solid parts, limited to the intake, compression and part of expansion strokes were drawn using SolidWorks. The model was then exported to ANSYS-CFX software where three techniques, immersed solid, moving mesh and multiple analyses, were combined to simulate the model and visualize the characteristics of the fluid flow with GVSTD. The heights of the vanes were also varied to optimize the effect of turbulence generated by GVSTD. The results of velocity, turbulence kinetic energy (TKE) and pressure are compared to justify the significance of this proposed modification.
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Copyright 2011 ICME