|
| Engineering Physics : Faculty : | |
| Riccardo Bonazza |
| Riccardo Bonazza Professor |
| 537 Engineering Research Building 1500 Engineering Drive Madison, WI 53706 |
 |
Tel: 608/265-2337 Fax: 608/262-6707 E-mail: bonazza@engr.wisc.edu |
Professor Bonazza's interests are in the areas of instrumentation and associated diagnostics as needed in the experimental investigation of impulsive, unsteady fluid flows such as shock-interface interactions and vapor explosion phenomena.
The interaction of a shock wave with the interface between two fluids of different densities enhances the mixing that takes place at the interface. In some cases the mixing is detrimental to the objectives pursued in the application. In inertial-confinement nuclear fusion experiments, eg, a spherical, hollow shell containing a deuterium-tritium mixture is imploded by the shock wave generated by ten laser beams focused on it. The objective is to raise the temperature and density of the nuclear fuel to obtain a self-sustained fusion process. Upon acceleration, the shell's manufacturing imperfections amplify causing the ablated shell material to mix with the fuel thus causing the end of the fusion process. In supersonic combustion systems, where fast, thorough mixing between fuel and oxidizer is indispensable to effective burning because of the very short residence time of the oxidizer in the chamber, shock-enhanced mixing could be used advantageously. The interaction of a shock with a fluid interface is investigated experimentally in a vertical, square shock-tube, using non-intrusive, optical diagnostics techniques.
The study of vapor explosions is related to the development of an industrial waste-processing technique in which a water solution of toxic organic compounds is injected into a pool of molten iron, to use the thermal shock and the catalytic action of the iron to chemically crack down the toxic compounds into their harmless components. The mechanisms of explosive vaporization, and the thermophysical conditions under which a mechanical explosion takes place are investigated. In a cryogenic simulation experiment, the interaction of hot water with different types of refrigerant is investigated, using a light-extinction technique. In another experiment, water is injected into a pool of molten tin and the system is imaged with a continuous X-ray source and digital imaging system.
|
|
Copyright 2007 The Board of Regents of the University of Wisconsin System Date last modified: 05-Nov-2007 Content by: bonazza@engr.wisc.edu Accessibility Web services Thank you for visiting http://www.engr.wisc.edu/ep/faculty/bonazza_riccardo.html |
