| 摘要 |
<p>The invention relates to a method for generating a mixed jet including frozen particles, in particular CO2 particles and a carrier gas comprising the steps: introducing a liquefied gas into an expansion cavity for generating a flow of agglomerated frozen particles from the liquefied gas; supplying the flow of agglomerated particles and a carrier gas flow to an acceleration nozzle for generating and accelerating a mixed gas jet including the frozen particles and the carrier gas. The following method alternatives are proposed to prevent particle agglomerations: lowering the pressure dew point, heating a wall of the expansion cavity and/or of the acceleration nozzle and/or introducing an additional gas flow in the form of an additional gas for increasing and/or controlling the flow velocity in the interior of the expansion cavity.</p> |
