TURBOdesign Volute

TURBOdesign Volute introduces a fresh approach to volute design for compressible and incompressible flows which allows for more practical and faster volute design cycles, eliminating most of the traditional CAD volute design work.

The code supports conventional 1D approach to volute design but also a novel 2D method which allows for specification of non-uniform inlet boundary conditions along a number of periodic sections or along the 360° volute inlet.

Design Process:

The first step in the volute design process involves specification of the main volute dimensions such as volute inlet radius and width along with the diffuser exit width and radial size.

User can then select symmetric or asymmetric volute cross section shapes at the entry, duct and outlet regions within a wide number of pre-defined cross sections shapes, such as circular, elliptical, semi-circular or rectangular and trapezoidal with squared or rounded corners. Alternatively, totally arbitrary cross sections can be defined to answer more challenging constraints and requirements.

The volute outlet pipe can also be defined as tangential or radial to the volute exit, arbitrary definition is also available and users can monitor the exit pipe cross section area and angles directly during the specification phase.

Inlet boundary conditions can then be defined considering constant radial and circumferential velocities for the conventional 1D volute design method.

The novel 2D volute design method allows instead for specification of a variation of both the radial and circumferential velocity components, generally as extracted from CFD data, these can be specified either for a single channel repeating over a number of periods, or across the whole 360° of the volute inlet.

Post Processing:

The solver runs in a few seconds and TURBOdesign Volute generates the full 3D volute. Users can assess the results by analysing a number of useful 1D and 2D information on the volute design or compare multiple designs to identify changes and improvements.

Detailed post-processing information helps to provide a faster volute design cycle, TURBOdesign Volute provides a full 3D view of the resulting volute design while volute height, cross-section areas, mass flow rate and velocities can be analysed and compared for various volute designs.


TURBOdesign Volute outputs a nice, clean and smooth IGES surface file, ready for meshing and analysis in CFD. The code automatically smoothes the transition between different cross sections, despite geometrical differences between these; the output will always be a clean surface file.

Alternatively, users can select the option to only save the IGES cross section so that volute design can be completed in their own CAD system.