Date of Award

5-2019

Document Type

Thesis - Open Access

Degree Name

Master of Science in Aerospace Engineering

Department

Graduate Studies

Committee Chair

Dr. Yechiel Crispin

First Committee Member

Dr. Eric Perrell

Second Committee Member

Dr. Mark Ricklick

Abstract

Swirling flows are complex fluid motions that appear in various natural phenomena and man-made devices. Numerous engineering applications such as turbomachinery, jet engine combustion chambers, mixing tanks and industrial burners involve swirling flows. This wide range of applications is due to unique characteristics offered by swirling flows such as increase in mixing rate, heat transfer rate and wall shear stress. In this study the axisymmetric swirling flow behavior in the context of a hybrid rocket engine have been analyzed. While modeling the flow inside a cylindrical chamber using CFD, a similarity with the Taylor vortices instability has been observed. Similar to the classic Taylor-Couette flow system, a secondary flow field in the form of wavy toroidal vortices spaced regularly along the axial direction appear under certain critical conditions. The dimensionless control parameter governing the formation of the Taylor-like vortices is expressed as the ratio of the tangential to axial velocity components.

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