This tool is very flexible for modeling hub, and shroud geometry if applicable. For demonstration purposes, we’re choosing a simple model of the hub contour. All Bezier points can be modified numerically by changing numbers in the pop-up window. The user can adjust axial length of the impeller, as well as shape and position of leading and trailing edge. There are diagrams for area progression, static moment and curvature which can assist you in shaping the meridional contour of the impeller. The meridional view allows the design of the meridional contours of the impeller. On the right side of the window you see important physical values, the Cordier diagram and initial velocity triangle on inlet and outlet of the impeller. Here we use the work coefficient to calculate the impeller diameter, and a diameter ratio function to get the hub diameter.

To calculate the impeller main dimensions, CFturbo uses numerous empirical correlations in the parameters section. Each stage should carry 50 % of the work. We chose the “Airfoil” method for blade design, and the multi-stage option. First we have adjust the tip clearance for an unshrouded impeller.

Now we add a new component, selecting the “Axial impeller” option. We can switch the rotational direction or add an inflow swirl, if required. You can choose any fluid properties by choice, or by applying a fluids database. The design point is defined by volume flow rate, total pressure rise, and rotational speed. In this video we’ll be demonstrating the aerodynamic design of an axial, contra-rotating fan, including a CFD-simulation.įirst you create a new project choosing the ventilator design module.

Ducted fan design software