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1 2004

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Cavitation Phenomena Inside an Autoclave Containing a Chemically Active Bubbly Medium

Mitropetros K., Fomin P. A., Ruckelshausen A., Hieronymus H

Archivum Combustionis

2004

Vol. 24 nr 1-2

53-69

In this work, cavitation phenomena inside an autoclave that contains a chemically active bubbly medium were investigated. Such media are required to conduct processes, such as liquid-phase hydrocarbon oxidation. The liquid was cyclohexane and contained explosive gas bubbles of cyclohexane and oxygen. Rarefaction waves were created inside the medium by the impact of a detonation wave on its surface. High speed optical 100,000 fps) and pressure 1Mhz) measurements were applied. The behavior of the pre-existing explosive bubbles as well as of the cavitation bubbles during the propagation of a pressure wave with positive and negative phase was optically recorded. This behavior was simulated by calculation. The calculated results correlate reasonably well with the experimental observations. Additionally, the influence of the internal geometry of the liquid's vessel on the existence of cavitation phenomena is experimentally demonstrated. It was found that asymetries in the cylindrical volume of the liquid, vertical to the propagation direction of a rarefaction wave, disturb or eliminate this wave.