MIME Seminar - Supersonic Impinging Jets

Friday, February 28, 2020
12:30 PM - 2:00 PM
Nitschke Hall 1027, SSOE Seminar Room
Event Type
College of Engineering
Kathryn Rose


Supersonic Impinging Jets

Omid Amili, Ph.D.; The University of Toledo 

Friday, February 28, 2020

1:00 – 2:00 PM

SSOE Seminar Room, NI 1027 


The physics of supersonic jets has been under investigation over several decades due to their various aerospace and industrial applications. When a jet flow exits a nozzle with a pressure higher than the surrounding pressure, an under expanded jet forms. This pressure mismatch generates a series of shock and expansion waves within the jet core. This situation becomes more complicated when the jet interacts with an impingement surface. High-fidelity measurements of the velocity and acoustic fields in supersonic jets is an integral part of the design and control of short vertical takeoff and landing (SVTOL) aircraft, rocket launching systems, and in certain industrial applications such as the cold spray coating process. The flow regime, instabilities, coherent structures, and the generated noise level are functions of a large parameter space that includes nozzle pressure ratio, nozzle shape, impingement plate shape, size, and angle, and stand-off distance. In this seminar, a part of an experimental campaign consisted of high-resolution particle image velocimetry, high-speed schlieren, and acoustic measurements are presented.


Omid Amili received his bachelor's degree in mechanical engineering from Tehran Polytechnic in 2003. Following his master's degree and two years of work in industry, he obtained his Ph.D. in mechanical engineering in wall-bounded turbulence from Monash University, Melbourne. There, he was a post-doctoral research associate in the Laboratory for Turbulence Research in Aerospace and Combustion (LTRAC) for two years where he worked in supersonic jets. In late 2015, he joined the Department of Aerospace Engineering and Mechanics at the University of Minnesota, Minneapolis, as a research associate to work in turbulence and biomedical flows. The common theme all along has been the development of hardware and software for flow diagnostics in complex settings. His research interests are primarily in experimental fluid dynamics, particularly in low- and high-speed turbulence and biological flows.

Participation is mandatory for all MIME graduate students.  Light refreshments will be served at 12:40

Omid Amili
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