The Feasibility of Using a Multiphase Carbon Dioxide Jet for Eschar Debridement.
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CLEMSON UNIV S C
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An experimental investigation was carried out to examine the feasibility of using a multiphase carbon dioxide jet as a surgical tool for eschar debridement. Experimental results show that under certain inlet conditions a multiphase CO2 jet emitting from a convergent-divergent nozzle possesses an excellent abrasive quality. The jet consists of fine liquid and solid CO2 particles suspended in gaseous CO2. Although the solid particles are irregular in shape, they may be approximated by spheres of 1 to 5 micron in diameter. The abrasiveness or the cutting capability of such a jet depends primarily upon the mass fraction of solid CO2 particles at the nozzle exit. Direct weighing and optical methods were used in determining the solid mass fraction. Experimental results also show that for a given nozzle geometry, correlations exit between the nozzle inlet pressure, inlet liquid mass fraction and the exit solid mass fraction. A map relating the jet cutting capability with inlet conditions is presented so that the nozzle inlet conditions may be readily regulated to obtain a jet possessing excellent abrasive or cutting capability. Author
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