Geometry generation

[RoberAgro]

Develop functionality to create the geometry of the centrifugal compressor

• [ ] Inlet guide vanes (in the future)
• [x] Impeller/rotor
• [ ] Interspace gap
• [x] Diffuser/stator
  • [x] Vaneless
  • [ ] Vaned-wedge (in the future)
  • [ ] Vaned-airfoil (in the future)
• [x] Volute
• [ ] U-bend (in the future)

Create function to plot the centrifugal compressor (translation from matlab)

• [ ] 3D view of the compressor
• [ ] Meridional plane view
• [ ] Blade-to-blade plane view

Make a table summarizing all the parameters needed to carry out a performance analysis calculation including:

• Essential input variables
• Dependent variables and how they are calculated from input variables
• Default values used for input variables in cases when they are not provided ("rules of thumb")

Think of a suitable set of design variables needed to define the geometric inputs for performance analysis: For example, it could be a set of variables like the following one:

• Overall
  • Flow coefficient (or specific speed?)
  • Work coefficient
• Impeller:
  • Inlet metal angle (and spanwise angle distribution?)
  • Outlet metal angle
  • Inlet hub to tip radius ratio?
  • Inlet hub to exit radius ratio?
  • Exit radius to height ratio?
  • Blade solidity or number of blades
  • Streamwise location of the splitter blades (fixed parameter?)
  • Axial length of the impeller (fixed parameter?)
  • Parameters defining the backplate geometry (not relevant for meanline model?)
  • Parameters defining the shape of the meridional channel (not relevant for the meanline model?)
• Diffuser:
  • Interspace radius ratio?
  • Diffuser height pinch ratio?
  • Vaneless diffuser radius ratio

[lasseband]

Functionality to determine geometry are implemented for the following components:

• Impeller
• Vaneless diffuser
• Vaned diffuser
• Volute

For each components the following variables are specified:

Impeller:

• Radius hub in
• Radius tip in
• Radius out
• Width out
• Leading edge angle
• Trailing edge angle
• Number of blades
• Impeller length
• Tip clearance

Vaneless diffuser:

• Wall divergence
• Radius in
• Radius out
• Width in

Vaned diffuser:

• Radius in
• Radius out
• Width in
• Leading edge angle
• Trailing edge angle
• Number of vanes

Volute:

• Radius Scroll in
• Radius Scroll out
• Radius Cone out
• Width in

Its easy to add variables. It must be specified in the pydantic model and then simply specified in the configuration. Calculations are done within geometry_model, where each component has its own function.

Interspace can be modelled as an vaneless diffuser. If the geometry of the interspace and vaneless diffuser cannot be combined, it is possible to specify two different vaneless diffusers. For now, there is no difference between airfoil or wedge shaped vanes in the radial diffuser.