Cavitating water jets are a useful tool in the mining industry among others. They allow for safe and non destructive drilling methods to be implemented. To help further understand the phenomenon of cavitation an experiment was conducted to get an understanding of the behavior of the mass flow rate through cavitation systems. The purpose of this thesis was to investigate the mass flow rate through a caviting water jet in submerged conditions. A series of tests where set up in order to test various nozzle geometries over a range of pressure conditions in which cavitation would and would not occur. The recorded results where then compared to theoretical results obtained via use of Bernoulli’s equation and CFD predictions.
From the results a way to calculate the mass flow rate in converging-diverging nozzles while in submerged conditions was found. How the various nozzle geometries affected the mass flow rate was also determined.