7.8. Input Parameters for Properties View of Blade Design Cell of a Vista CPD System

Parameter

Notes

General

BladeModeler units

[mm | in]

Impeller export type

[Coupled to Volute |Isolated impeller]

General Duty

Rotational speed

Density

Volume Flow Rate

Impeller duty

Head

 

Inlet flow angle

 

Meridional velocity ratio

 

Impeller efficiency

Automatic | Hydraulic efficiency calculated | Volumetric efficiency calculated | Mechanical efficiency calculated | Overall Pump efficiency calculated

Hydraulic efficiency

Only for Impeller efficiency set to Volumetric efficiency calculated, Mechanical efficiency calculated, or Overall Pump efficiency calculated

Volumetric efficiency

Only for Impeller efficiency set to Hydraulic efficiency calculated, Mechanical efficiency calculated, or Overall Pump efficiency calculated

Mechanical efficiency

Only for Impeller efficiency set to Hydraulic efficiency calculated, Volumetric efficiency calculated, or Overall Pump efficiency calculated

Pump efficiency

Only for Impeller efficiency set to Hydraulic efficiency calculated Volumetric efficiency calculated, or Mechanical efficiency calculated

Impeller geometry

Number of vanes

 

Shroud LE blade angle

[Specified incidence | Specified blade angle]

Incidence at shroud

Only for Shroud LE blade angle set to Specified incidence

Shroud leading edge blade angle

Only for Shroud LE blade angle set to Specified blade angle

Exit blade angle

 

Hub inlet draft angle

 

Shaft minimum diameter factor

 

Shaft diameter ratio Dhub/Dshaft

 

Vane thickness ratio thk/D2

 

Tip diameter specification

[Automatic | From head coefficient | User defined]

Head coefficient

Only for Tip diameter specification set to From head coefficient

Tip diameter

Only for Tip diameter specification set to User defined

Hub/Mean LE blade angles

[Cotangent, relative to shroud | Cosine, relative to shroud | User defined]

Hub leading edge blade angle

Only for Hub/Mean LE blade angles set to User defined

Mean leading edge blade angle

Only for Hub/Mean LE blade angles set to User defined

Exit rake angle

Volute geometry

Casing rotation angle

 

Volute style

[Elliptic & circular X-sect | Rectangular X-sect]

Aspect ratio (height/width)

Only for Volute style set to Rectangular X-sect

Specify diffuser exit hydraulic diameter

[select | clear]

Diffuser exit diameter

Only for Specify diffuser exit hydraulic diameter selected

Specify diffuser length

[select | clear]

Diffuser length

Only for Specify diffuser length selected