Design And Study On Aerodynamic Performance Of Counter-rotating Axial-flow Pneumatic Fire Extinguisher

On the basis of the technical requirements of portable pneumatic fire extinguisher, this paper analyzes the relationship between the pressure of the counter-rotating axial flow pneumatic fire extinguisher internal airflow velocity relation, inflow and outflow in the perspective of relations and the resistance of the impeller blade airfoil lift, the aerodynamic performance of the counter-rotating axial flow pneumatic fire extinguisher relationship, and on this basis, two pairs of rotating impeller fan aerodynamic design to determine the relevant parameters of the blade.Connection in the study of rotating axial flow fan and a small gasoline engine, designed on the basis of the specific form of the rotating impeller, gear box, the impeller blades, fire-fighting hairdryer, and a small gasoline engine selection.Discrete CFD mesh model the flow field within the fan airflow on the basis of the basic equations in computational fluid dynamics, using the k-epsilon turbulence model and the SIMPLE algorithm, the internal flow on a rotating axial flow pneumatic fire extinguisher the field of numerical simulation analysis, while its aerodynamic performance compare with the theoretical estimates. Both the degree of fit better, provide a reference for the design and optimization of the rotating axial flow pneumatic fire extinguisher.