INTRODUCTION

Aerodynamics & Vibration Research Environment for Gas Turbine Blade

Thanks to eTURB you can now start your own CAE (Computer Aided Engineering) workflow in just few clicks. eTURB, in fact, brings you the most innovative feature of HPC (High Performance Computing) and engineering software. eTURB is a web-application which allows to run CFD/CSD simulations directly from your browser. The software used to run the calculations are Aero_Turbine,  Mesher and Turbine_FOM, Snapshot, ROM on EDISON science & engineering platform. These high-end simulation framework and solvers provides advanced software for CAE simulations currently available.

Using eTURB means entering a new mindset, a new philosophy of simulating. Therefore, in order to be able to read and understand the following tutorials, bear in mind the following key definitions:

Research Platform for the Vibration/Aerodynamics of Gas Turbine Blades: High precision / high efficiency gas turbine aerodynamic / vibration simulation software can be utilized.

Simulation Project: Create your own analyzed project space, perform project-based simulations, invite colleagues and discuss.

Dataset / Analysis: Manage / share data or perform analysis / forecasting.

References: You can check the papers and lecture materials related to gas turbine aerodynamics & vibration.

  1.  

GEOMETRY

The geometry step represents the phase in which the user defines the main geometrical characteristics of the case. The user is required to draw a complete geometry using a CAD software. The geometry file must be loaded in terms of fluid volume in case of a CFD analysis and solid volume in case of CSD analysis.

File data

  • FreeCAD handles detailed CAD processing, and export the final blade geometry and extracted airfoils. 
  • Upload your geometry file. Supported formats are: OBJ.
  • File Units: definition of the unit system used to generate the geometry file.

Practice

  • In geometry phase of eTURB the users have got no request to group the input cad file surfaces into boundaries.
  • These boundaries are mostly pre-defined with validated one, and the rest of them can be in later stages

<eTURB_Viewer>

 

eTURB is especially concerned on the airfoil shape parametrization. All data are allocated in accordance with the shape parameters.

 

<eTURB_Airfoil_Shape_Parametrizer>

 

MESH

How the mesh nodes are distributed affects not only the accuracy the of the flow solutions but the time it takes to obtain the flow solutions

 

Grid generation for CFD  

  • Grid generation part of CFD analysis procedure is still a time-consuming and labor-intensive process
  • it requires experience and many man-hours
  • it is usually a trial-and-error process
  • Generally, it is agreed that grid generation is the bottle-neck for a routine application of CFD
  • eTURB employed the accurate and light structured for 2D airfoil and the flexible unstructured for 3D blade 
  • Grid type

    Structured multi-block grid for 2D airfoil

    Unstructured hybrid grid for 3D blade (on-going) 

<eTURB_Mesh_creater>

 

<eTURB_Mesh_viewer>

 

Mesh generation for FEM  

  • Using commercial SW at the moment
  • Co-rotational finite element method
  • NASTRAN format
  • eTURB employed the unstructured 
  • Mesh type

    Tetrahedral 10-nodes (high fidelity)

     

<Patran_StrucMesh>

 

 

Run-Solvers

eTURB provides advanced run-simulation interface service named App_Workbench which enables engineers to run HPC applications more handily.

Users write input parameter data, and  monitor/analyze at the same window. Parametric studies can be performed efficiently.

 

<eTURB_AppWorkbench>

 

 

Post-Processor

Large result files can be downloaded, and analyzed in users' own desktop.

eTURB provides VTK and Tecplot format both.

 

<Paraview_Aerodynamics_Result>

 

<Paraview_FreeVibration_Result (FOM vs. ROM)>

 

File-Managers

File managing services in the cloud environment 

 

<eTURB_File_Manager>

 

<eTURB_Job_File_Manager>

 

eTURB provides several data visualization plots directly loaded from file manager and from users desktop

<eTURB_Data_Graph>

 

Documents

Research papers, technical reports, and tutorial presentations.

<eTURB_Documents>

 

Project-Group

Create your own problem group. You can invite other users here, and communicate about the concerned problems.  

<eTURB_Project_Group>

0 (0 투표)