GPPS CFD Workshop

GPPS 1st Turbomachinery CFD Workshop

We would like to thank everybody who attended and helped to bring the GPPS CFD Workshop to fruition. The event has been some time in the process due to Covid related postponements, however from initial feedback the Workshop was deemed successful and a valuable resource for the community.

We have been very pleased to have high interest in the event, with over 250 registered participants across the Workshop including 12 extremely interesting and professional presentations.

Turbomachinery CFD workshops are very important for the community and we look forward to hosting further Workshops in the future.

We are currently collating the presentations and will distribute the slides to all participants in the coming days.


RANS simulation is the industrial workhorse for predicting turbomachinery flows. However, due to the errors and uncertainties involved in the experiments and CFD models, users can occasionally find inconsistency and deficiency of RANS results, which degrades users’ trust in RANS turbomachinery solvers. This workshop helps improve users’ trust in RANS turbomachinery solvers by conducting a validation and verification (V&V) study on the TUDA-GLR-OpenStage transonic axial compressor. The TUDA-GLR-OpenStage is a state-of-the-art industrial-level machine that is challenging for RANS CFD.


  1. Troubleshooting and version control of numerical models in existing turbomachinery RANS solvers.
  2. Enhance understanding of RANS prediction capability for transonic axial compressors.
  3. Develop a best practice guide of RANS solvers for transonic axial compressors.
  4. Promote education of the next generation turbomachinery CFD engineers.

Workshop Organizers

Please do not hesitate to contact Xiao He (Imperial College London) or Fabian Klausmann (TU Darmstadt) with any questions. Further updates will be published online and via social media as we approach the workshop date.

How to participate

Participants are welcome to simulate this case, submit their prediction results, or attend the workshop to listen and learn from the discussions. In the workshop, the organizers will present a virtual lab tour of the test rig and a summary of all submitted data. After that, each participant submitting the prediction results will have a 10-min rapid talk to present the results. No paper submission is required.

Step-by-step participation guide is as follows:

1. People who attended the virtual GPPS Chania20 technical conference can request access to the geometry, experimental data, boundary conditions, and official grids of the test case without prior registration for Xi’an21 by filling in the data request form in the left column. Please submit the signed legal agreement when requesting the data. The GPPS staff will send you the link to the data within three days after your request.

2. People who have not attended the GPPS Chania20 need to register for the Xi’an21 workshop on the GPPS website. The CFD Workshop is complimentary for Xi’an21 conference registrants (both day-pass and full conference tickets), but it is also possible to register solely for the CFD workshop for a fee. Upon successful registration, please request the data by downloading and completing the legal agreement, then filling in the request form in the left column attaching your signed legal agreement. The GPPS staff will send you the link to the data within three days after your request.

3. Submissions are still welcomed until the end of November, but we encourage participants to submit their results asap. Later submissions may have a shorter presentation time due to the limitation of the presentation slots. The data format should follow the submission guideline provided with the workshop data, please send the zipped submission file to

4. Chania20 attendees have to register for the CFD workshop to attend and/or have their submitted data processed by the organizers. The registration deadline is November 3rd.

Our location

With team members spread across the globe, the core team is based in Zurich Switzerland.


Landis + Gyr-Strasse 1, 6300 Zug