University of Minnesota
Aerospace Engineering and Mechanics
Spring 1997 Seminar Series


Shock Tube Experiments in Aerodynamic Breakup of Newtonian and Non-Newtonian Liquids



Professor Jacques Belanger
University of Minnesota
Department of Aerospace Engineering and Mechanics


Abstract

The goal of this research program is to understand the dissemination process of Newtonian and non-Newtonian liquids which are suddenly exposed to a high velocity air stream. The main objectives are to use carefully controlled experiments in a shock tube to analyze the breakup mechanics and the resulting droplet clouds. This research is funded by an Army grant. The Army is interested to know how a liquid payload inside an incoming missile will disperse when hit by an interceptor. The research is also funded by an NSF grant, motivated by an interest in understanding the physics of high-speed liquid breakup.

After an introduction to the facility and the instrumentation available in the lab, the talk will explain how shock tube experiments can be used for parametric studies and for reproduction of high altitude/high-speed intercepts. The talk will then focus on the breakup mechanics for Newtonian and non-Newtonian liquids tested up to now. A high-speed camera is used to make films showing the breakup process. The high-speed camera take pictures at a rate of 200,000 frames per second. With the breakup process lasting between 250 and 500 microseconds, the reconstructed films have between 50 and 100 frames each.


Friday, June 6, 1997
209 Akerman Hall
2:30 p.m. - 3:30 p.m.


Refreshments served after each seminar in 227 AKERMAN HALL .
Disability accommodations provided upon request.
Contact the Department of Aerospace Engineering and Mechanics : (612) 625-8000.