Workshop Organizers
Our organizers have wide background: academia, industries and software companies.
Mehdi Vahdati, Xiao He (Imperial College London)
Shenren Xu, Dongming Cao,
Dingxi Wang
(Northwestern Polytechnical University)
Senthil Krishnababu
(SIEMENS Energy)
Domenico Mendicino,
Benoit Tartinville
(Cadence Design Systems)
Guangfeng An, Xianjun Yu
(Beihang University)
Fabian Klausmann
(Technical University Darmstadt)
GPPS 4th Turbomachinery CFD Workshop
Our CFD workshop took place on Wednesday 4th September during the main Chania24 Technical Conference in Greece. Participants submitted their predicted results ahead of time, with a short presentation during the event serving as focal point for discussions and analysis.
During the Chania24 conference, as part of the workshop, we also featured three prominent plenary keynote talks providing valuable insights on Computational Fluid Dynamics (CFD).
Motivation
Computational Fluid Dynamics(CFD) has been playing an indispensable role in modern turbomachinery design. Nevertheless, RANS-based CFD has been abused, leading to eroded trust on it. This abuse can be attributed to the easy use, easy accessibility, robustness, and probably oversell of commercial CFD software and “always good results” of CFD related publications (otherwise they cannot be published). CFD, as a tool, has its own limitations and strength. Users need to be aware of those limitations and strength to maximize the potential and avoid the abuse of CFD.
The GPPS turbomachinery CFD workshop series were launched to achieve three objectives through performing validation and verification. The first is to raise the awareness of the limitations and strength of CFD. The second is to develop a best practice guide of RANS solvers for turbomachinery applications. The third is to promote education of the next generation turbomachinery CFD engineers.
This is the fourth workshop of its series. Different from the previous three workshops which were held as a dedicated event, the coming workshop will be integrated with the technical conference. Three CFD keynotes from computational veterans will provide us with retrospects and perspectives. The CFD workshop, consisting of a summary presentation, participant presentations and discussions, will be run as a parallel session with other technical conference sessions.
Case and Tracks
The TUDa compressor represents the state of the art of its category and has valuable high quality experimental data. This year’s workshop will focus on this compressor, and submissions are welcomed in any of the following three tracks:
(1) Steady RANS
The goal is to: (1) verify new submission against previous submissions in predicting compressor performance (see Fig. 1 below); (2) understand the effect of different RANS models (e.g., turbulence model, wall stress model, R-S interface model, etc.) in changing the compressor performance.
(2) Unsteady RANS
The goal is to: (1) validate if URANS can capture the same stall inception mechanism as the experiment, indicated by the casing wall unsteady pressure data (see Figure 2-4); (2) understand the effect of URANS with the sliding plane in changing the stator exit profiles of flow quantities (see Figure 5)
(3) Scale-Resolving Simulations
The goal is to: (1) validate the rotor exit flow field especially in the vicinity of the casing (see Figure 6); (2) comparing with steady RANS predictions for better understanding of the shortcomings of the turbulence model.
