A theoretical study on nozzle design for gas-particle mixture flow.

概要

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The theoretical equations governing the nozzle flows of a gas–particle mixture was extended to the complicated case where a continuous distribution of particle sizes is present and some calculation examples were demonstrated in the previous paper. But, the governing equations were applicable only to the case where the gas–phase velocity is subsonic. Then, we have, here, rewritten an equation to obtain the gas–phase velocity in the form different from the previous case so that the governing equations are valid to the whole gas velocity region including the supersonic flow. Thereby, a few sample calculations have been illustrated for supersonic mist flows composed of air and water–particles, which are commonly applied to the secondary cooling zone of continuously cast slabs. The results so obtained have been discussed from a numerical point of view. Also, it has been shown that the nozzle geometry can be designed in accord with the pressure profile given along a nozzle axis in advance.
The Iron and Steel Institute of Japanの論文