Implementation of Developing Linear Hydrodynamic Instability Theory on a Hollow Cone-shaped Liquid Sheet of a Swirl Injector

Karimaei, Hadiseh; Ghorbani, Ramin; Hoseeinalipour, Seyed Mostafa

doi:10.22034/jsst.2019.81876

Document Type : Research Paper

Authors

¹ Assistant Professor, Aerospace Systems Research Institute, Aerospace Research Institute, Ministry of Science, Research and Technology, Tehran, IRAN

² M.Sc. Mechanical engineering faculty, Iran University of science and technology, Tehran, IRAN

³ Associate Professor, Department Mechanical Engineering. Iran University of Science and Technology, Tehran, IRAN

https://doi.org/10.22034/jsst.2019.81876

Abstract

In the atomization process, small disturbances grow in liquid jet or sheet and eventually cause to disintegrate it into ligaments and smaller droplets. Concerning to the motion of waves on the liquid sheet surface, the stage of primary breakup is deterministic and can be predicted by instability analyzes. In early studies, the theories of linear and weakly nonlinear instability have been implemented on a cylindrical liquid sheet and the effect of spray cone angle was not included in the model. Therefore, in this paper in order to improve the model, the linear instability theory is implemented on a cone-shaped liquid sheet for the first time, and therefore radial velocities of liquid and gas phases are also considered moreover than axial and tangential velocities. The results of this improved model such as maximum wave growth rate and its corresponding wave number can be used to estimate mean droplet diameter and breakup length.

Keywords

20.1001.1.20084560.1397.11.4.1.3

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Space Science and Technology

Implementation of Developing Linear Hydrodynamic Instability Theory on a Hollow Cone-shaped Liquid Sheet of a Swirl Injector

References

References

Volume 11, Issue 4 - Serial Number 37
December 2018
Pages 1-10

Implementation of Developing Linear Hydrodynamic Instability Theory on a Hollow Cone-shaped Liquid Sheet of a Swirl Injector

References

References

Volume 11, Issue 4 - Serial Number 37December 2018Pages 1-10

Volume 11, Issue 4 - Serial Number 37
December 2018
Pages 1-10