On page Setup you can specify some basic settings.

 

On panel Unshrouded you can decide to design a shrouded or unshrouded impeller. For an unshrouded impeller you have to define the tip clearance.

 

On panel Blades you have to specify the number of blades, optionally with splitter blades. The number is usually between 3 and 7 for pumps and 6 and 10 for ventilators.

Many blades - causing low blade loading - are related to higher friction losses. By choosing of fewer blades - leading to a higher blade loading - the hydraulic losses may rise due to increased secondary flow and stronger deviation between blade and flow direction.

 

 

 

For a new design you can create a fully automated initial design of the impeller with default settings: see Full impeller

 

Some design point values are displayed in the right Information panel when selecting the page Values (see Global setup).

Page url: http://www.cfturbo.com/fileadmin/content/manual/en/index.html?md_setup_pumpvent.html