Smarter CAD for Turbomachinery Components

Blades, impellers, volutes, endwall contouring, ducts etc. – CAESES® gives you a powerful environment to create your simulation-ready and robust CAD models for your turbomachinery applications. CAESES® offers the highest level of customization to take into account all your turbomachinery know-how and experience.

The powerful scripting possibilities of CAESES® allow you to seamlessly integrate these amazing variable models into your existing design process.


Simulation-Ready CAD for Automation

No more manual pre-processing for new design candidates – just set it up once and run your studies and optimizations. CAESES® models can be linked to your meshing and CFD software as well as to ready-to-use optimization strategies. If you already use optimization tools in your company, then run CAESES® in batch mode and use it as your smarter geometry engine in a CFD-driven design process. We offer a Windows and also a Linux version of CAESES®, to run large studies on HPC clusters or powerful workstations.


Variable and robust models for axial turbine blades


Who Uses CAESES?

Leading companies from e.g. the automotive and energy sectors are using CAESES® for the optimization of blades, volutes and other turbomachinery components such as ducts and casings. Examples are SIEMENS, Toyota, Mitsubishi, MTU and Multi-Wing.

What’s their reason to choose CAESES®? In most cases the design and automation possibilities of other CAD tools in the market are limited. In particular, the regeneration of complex geometry models in automated optimization loops often leads to busted or infeasible designs. CAESES® solves theses problems immediately.


Blade Design

For the parametric blade design, CAESES® offers a dedicated add-on which makes it your comprehensive turbomachinery blade design tool. CAESES® gives you the full control to efficiently fine-tune all details of your initial blade shape by using your own parameters. You are not limited to black box functionality or pre-defined functionality. Everything is open, can be accessed, and can be customized according to your expertise and your ideas.

Flexible and automated shape studies

Flexible and automated shape studies

CAESES® blade models are ready for the fast manual and automated creation of new design candidates. Create single-blade and splitter blade models, and always have full access and customization possibilities such as

  • Any 2D profile parameterization
  • Any meridional contours (imported, parametric)
  • Any leading edge and trailing edge shapes
  • Any camber definitions (based on mapping beta/theta functions)
  • Any thickness distributions
  • Any shape for radii fillets (constant, variable)
Axial fan design with CAESES

Axial fan design with CAESES

CAESES® works for any kind of rotating machinery, no matter if you are designing turbochargers, fans, pumps, axial compressors or turbines.

Integrated blade design for various impeller and blade types


There are a couple of online demo models available for blade design. The stator model allows you to change the blade shape and the endwall contouring. The axial fan model is rather simple but also gives you some first idea of the possibilities.


Full Turbine Wheel Design and Optimization

CAESES® also allows you to generate complex models that satisfy the requirements of both CFD and structural analysis. With a robust and variable turbine wheel model, automated studies can consider the aerodynamic performance but also stress characteristics at the same time, in a single loop and fully automated. Check out the case study about turbine blade optimization including scallops.

Parametric segment model of the turbine blade

Parametric segment model of the turbine blade

Variation of the turbine blade and scallops

Variation of the turbine blade and scallops



CAESES® is the perfect design tool for volutes of turbochargers and pumps. 100% robustness and the possibility to build-in company-specific design parameters are the main benefits for you as a CAESES® user. Create your own model – or let us help you to create a custom template model that can be used in your CFD department without any CAESES® expertise! Read more.

Volute design in CAESES

Robust volute design for pumps and turbochargers


Pump Design and Optimization

Leading pump designers worldwide such as KSB, Ebara and DMW use CAESES® to optimize their pump and volute geometries. Read more.

Automated pump impeller variation in CAESES

Automated pump impeller variation in CAESES


Endwall Contouring

The idea of endwall contouring is to be able to modify the hub and shroud geometry, e.g. in the leading edge region of the blade, to minimize undesired secondary flow losses. With CAESES® you create your own parametric models for these free-form surfaces. We can also provide existing efficient models that can be readily used for optimization. Check out the blog post “Variable Geometry for Endwall Contouring of Turbines and Compressors” for more information and a short demo video.

endwall contouring

Parametric endwall contouring for compressors and turbines


Example Applications

  • Fans and blowers (axial, radial, mixed flow)
  • Pumps (centrifugal, axial, mixed-flow, multi-stage)
  • Blading for axial compressors and turbines
  • Blading for radial and centrifugal machines
  • Volutes and scrolls
  • Endwall contouring
  • Propellers for ships and aircraft
  • Wind turbines
  • Turbine exit casings
  • Compressor discharge valves

spencer turbineI enjoy using CAESES® as it allows me to parametrically generate geometries without ever going through a CAD design cycle. In this sense it really streamlined my process from concept to CFD verification.

— Ruhou Gao, Turbomachinery Engineer, Spencer Turbine Company


Why CAESES® for Turbomachinery Applications?

twin_scroll_voluteThere are several benefits when you compare CAESES® to conventional CAD-CFD workflows. From our customer feedback the following ones are the most important:

  • Robustness and flexibility of parametric models
  • High level of customization i.e. no black box models and full integration into existing workflows
  • Direct and automated consideration of geometric/manufacturing constraints within model setups
  • Intelligent reduction of the total number of parameters
  • Powerful fine-tuning possibilities of shape details (e.g. to better control local flow phenomena such as cavitation or swirl)
  • One-time preprocessing for all design variants
  • Everything is geared towards automation, for the purpose of efficient shape optimization
  • Batch mode and Linux version available for extensive use on HPC clusters
  • Incredibly fast support from the CAESES® support team


Customer Interview

There is an interview “Creating Lighter and More Efficient Radial Turbines” with Nicolas Lachenmaier, who is the leading aerodynamics & thermal turbine engineer at MTU. Read how the use of CAESES® models massively brought down the overall engineering time from several months to only a few weeks!

interview nicolas lachenmaier mtu radial turbines



Please find a summary in the Turbo add-on brochure (PDF). There is also a CAESES®  tech brief (PDF) which also summarizes the most relevant features and benefits for turbomachinery applications.


More Information

Leading companies such as SIEMENS, Toyota, MTU, KSB, Spencer Turbine and IHI are using CAESES® for the design of turbomachinery components. Here is a SIEMENS case study for the design and optimization of turbine blades. A turbocharger optimization is demonstrated in the research project GAMMA, see “Turbine Blade Optimization including Scallops for a Turbocharger“, and in the case study optimization of volute and vaned diffusor. If you are interested in stator optimization, then check out this blog post about the TU Berlin Turbolab stator. There is also a short article about ANSYS Turbogrid export. If you are interested in axial turbine design, please see this page which shows in a short summary video how to set up such a model.

Sounds interesting? Then just drop us a line and we’ll get back to you 🙂




Stator optimization

Parametric model of a stator for efficient and robust aerodynamic shape optimization


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