Experimental and Mathematical Modeling of the Interaction of a Perturbed Free Shear Layer With a Flat Plate

A mathematical model which predicts the upstream effects of the impingement of shear layers on a solid boundary located in the linear region of the shear layer is developed. The model is compared with experimental results. The experimental results and the model suggest that the oscillations that are most amplified are those whose feedback signals from the disturbance plate are nearly in phase with the wave at the splitter plate separation edge. This causes the frequency of the oscillations to gradually decrease as the plate is moved downstream. This drop continues until a certain impingement length is reached where the oscillations can not sustain themselves and by addition of an extra wavelength between the splitter plate and plate leading edge, the phase condition is again satisfied.

Name thesis:degree_name

Ph.D.

Level thesis:degree_level

Dissertation

Discipline thesis:degree_discipline

Theoretical and Applied Mechanics

Grantor

University of Illinois at Urbana-Champaign

Year dc:date

2014

Author dc:creator

• Merati, Parviz

• Engineering, Mechanical

Identifier

(UMI)AAI8521834

OAI identifier oai:identifier

oai:www.ideals.illinois.edu:2142/71681