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Axial-flow axial fan is used as fire fighting parts in the axial-flow pneumatic extinguisher. The shape of axial impeller is the key factor affecting the internal flow field structure of fire-fighting fan, outlet total pressure and flow velocity. In order to understand the flow pattern of axial-flow fire-fighting fan thoroughly, according to N-S equations and k-?? turbulence model, the internal three-dimensional...
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