Helical modes in a hydrodynamically self-excited jet
Project Description

Low-density jets are a canonical model of a hydrodynamic oscillator. They are known to exhibit global instability in the form of self-excited axisymmetric oscillations, but are not generally known to support self-excited helical oscillations. In fact, the existence of helical modes in such jets has been predicted only a few times before (e.g. in the local linear spatiotemporal stability analysis of Coenen, Sevilla, and Sanchez [Physics of Fluids (20) 2008]) but helical modes have yet to be detected in real-world experiments. In this project, you will perform laboratory experiments to search for the existence of helical modes in low-density jets, potentially opening up new pathways through which such global hydrodynamic instabilities can be used in industrial and environmental applications such as aircraft engines and pollutant dispersion.

Supervisor
LI Larry
Quota
4
Course type
UROP1000
UROP1100
UROP2100
UROP3100
UROP4100
Applicant's Roles

Please see project description.

Applicant's Learning Objectives

Please see project description.

Complexity of the project
Moderate