OpenFOAM Turbomachinery Working Group: Progress report

OpenFOAM TurbomachineryWorking Group:Progress reportMaryse Page andMartin BeaudoinHydro-Québec,Research InstituteHåkan NilssonChalmers Universityof TechnologyFifth OpenFOAM WorkshopGothenburg, 21-24 June 2010

About the OpenFOAM Turbo WG‣ Initiated at the Second OpenFOAM Workshop inZagreb, June 2007‣ Steering committee:Maryse Page, Martin Beaudoin (Hydro-Québec)and Håkan Nilsson (Chalmers)‣ Homepage:• OpenFOAM Wiki:http://openfoamwiki.net/index.php/Sig_Turbomachinery‣ Code sharing:• A branch of the OpenFOAM-extend project onSourceForge.net‣ Contact:openfoam-extend-turbowg@lists.sourceforge.netFifth OpenFOAM WorkshopGothenburg, 24 June 20102

Objectives of the Working Group‣ Identify common interests with OpenFOAM forturbomachinery, and plan joint activities‣ Develop OpenFOAM for turbomachinery applications,including pre-processing, solution methods, and postprocessing.‣ Provide tutorials on how to produce accurate results usingOpenFOAM in turbomachines.‣ Distribute relevant validation test cases and correspondingOpenFOAM applications.‣ Use OpenFOAM to develop Best Practice Guidelines forCFD in turbomachines.‣ Connect people with the same interest: OpenFOAM andturbomachinery.‣ Organize meetings, workshops and collaborationsFifth OpenFOAM WorkshopGothenburg, 24 June 20103

Contributions to OpenFOAM Wiki‣ Developments• Descriptions of contributed solvers, utilities and libraries.‣ Tutorials• How to implement (new application, boundary condition,turbulence model)• Cylindrical coordinate systems• turboPerformance functionObject‣ Howtos: mergeMeshes, GGI, MRFSimpleFoam, etc.‣ Validation test cases• ERCOFTAC conical diffuser• Dellenback Abrupt Expansion (in turbulenceWG wiki)• ERCOFTAC centrifugal pump• Single-channel pump• Timisoara swirling flow test rig‣ List of publicationsFifth OpenFOAM WorkshopGothenburg, 24 June 20104

OpenFOAM-extend extend on SourceForge.net‣ Contributions to Turbomachinery branch:• Source codes:– Mesh converters (cgnsToFoam, foamToCGNS)– Specialized BC (profile1DfixedValue)– Pre-processing tools (addSwirlAndRotation, initializeRotation)– turboPerformance functionObject• Case-studies/tutorials/validation– ercoftacConicalDiffuser– ercoftacCentrifugalPump– singleChannelPump– timisoaraSwirlGeneratorFifth OpenFOAM WorkshopGothenburg, 24 June 20105

Work in progress‣ Development:• MixingPlane interface• Automated test-loop :– Update and compile librairies and applications– Run test case suite– Parallel benchmarking‣ Validation and testing:• GGI, cyclicGGI• GGI and mixingPlane in parallel‣ HPC for hydroturbines applications on large clusters‣ Also, contributions from University of Munich:• domainScaling interfaces• overlapGGIFifth OpenFOAM WorkshopGothenburg, 24 June 20106

Case-studiesstudies‣ Instructions and comments on OpenFOAMWiki‣ All files available on OpenFOAM-extend• cases set-up• experimental data• applications, libraries‣ Mesh parametrization for blockMesh using m4(O-grid, radial grid)‣ Automatic post-processing (sample, gnuplot)‣ Space for documentationFifth OpenFOAM WorkshopGothenburg, 24 June 20107

ERCOFTAC Conical DiffuserRef: P.D. Clausen, S.G.Koh and D.H.Wood,Measurements of a Swirling Turbulent Boundary Layer Developingin a Conical Diffuser,Experimental Thermal and Fluid Science 1993, 6:39-48Fifth OpenFOAM WorkshopGothenburg, 24 June 20108

Cases in OF Wiki and OpenFOAM-extendextendCase0Case1Case2Case0: Base caseCase1: Extended base caseCase1.1: Radial meshCase1.2: MFRSimpleFoamCase1.3: 2D wedge meshCase2: Case1 with a dumpCase2.1: Inlet velocity profileCase2.2: Radial mesh• All cases except Case1.2 use simpleFoam•k-ε with wall functions, average y + : 25-27• div(phi,U) Gauss linearUpwind Gauss;• div(phi,k) Gauss upwind;• div(phi,epsilon) Gauss upwind;Fifth OpenFOAM WorkshopGothenburg, 24 June 20109

The Dellenback Abrupt Expansion case-studystudy‣ Dellenback, P.A., Metzger, D.E., and Neitzel, G.P., 1987,Measurements in Turbulent Swirling Flow Through an AbruptExpansion, AIAA J., 26(6), pp.669-681‣ http://openfoamwiki.net/index.php/Sig_Turbulence_/_Dellenback_Abrupt_Expansion-2.00Z/D-0.250.000.250.500.751.001.502.003.004.00... 6.00, 8.00, 10.00, 12.00DZ.Fifth OpenFOAM WorkshopGothenburg, 24 June 201011

Single-Channel Pump‣Ref: Auvinen, M., Ala-Juusela, J., Pedersen, N. and Siikonen, T.,“Time-Accurate Turbomachinery Simulations iwht Open-Source CFD;Flow Analysis of a Single-Channel Pump with OpenFOAM",ECCOMAS CFD 2010, Lisbon, June, 2010Fifth OpenFOAM WorkshopGothenburg, 24 June 201012

Timisoara Swirling Flow Test Rig‣Ref: Bosioc, A.,“2D LDV Measurements on Swirling Flow in a Simplified Draft Tube",Proceedings of the CMFF, 2009Fifth OpenFOAM WorkshopGothenburg, 24 June 201013

Agenda for Turbo WG meeting (AM)‣ Some topics related to GGI• H.Jasak (Wikki), M.Beaudoin (Hydro-Québec)‣ ERCOFTAC Centrifugal Pump Case-Study• S.Xie, O.Petit and H.Nilsson (Chalmers)‣ Timisoara Swirling Flow Test Rig Case-Study• O.Bergman, O.Petit and H.Nilsson (Chalmers)‣ Single-channel Pump Case-Study and turboPerformancefunctionObject• M. Auvinen (Aalto University) and N.Pedersen (Grundfos)‣ Update on the mixingPlane interface development for steadystatecomputations• M.Beaudoin (Hydro-Québec)‣ Contributions / presentations / discussions from the audience‣ Discussions : Aims for the next yearFifth OpenFOAM WorkshopGothenburg, 24 June 201014

Agenda for Turbo/ShipHydro WG meeting(PM)‣ Cavitation modelling WG – a proposal• M.Page (Hydro-Québec)‣ Cavitition modelling case-studies• M.Page, R.Bannari, H.Nilsson, R.Bensow, S.E.Kim and E.Paterson‣ Multiphase turbulent flow simulation around foil,propellers and pumps – Numerical and physicalmodeling• S.E.Kim (David Taylor Model Basin)‣ DiscussionsFifth OpenFOAM WorkshopGothenburg, 24 June 201015