Valid idation ation of Radial al Turbomac bomachiner hinery Performance ormance and nd No Noise se Issue ues Fred Mendonça, donça, CD-adapco dapco
Overvie view Some me reminde minders s of the e new w feature tures s for Tur urbom bomachi achine nery in STAR AR-CC CCM+ M+ v7 focussed around automeshing of complex geometries and high-end physics – Multi-row Harmonic Balance – Circumferential Averaging on unstructured meshing – Unwrapping for meridional and blade-to-blade views Valida dati tion on of radial l com ompres resso sor r performance ormance map – High-Re vs Low-Re wall resolution – Installation effects Trans nsien ient t calcula ulati tion on, delving ving into o compre ress ssor or nois ise Out utloo ook k
Some me new features tures in STAR-CCM CM+ + v7 – multi lti-row w HB
Some me new features tures in STAR-CCM CM+ + v7 – multi lti-row w HB
Some me new features tures in STAR-CCM CM+ + v7 – multi lti-row w HB
Circumf umferen erenti tial al averaging aging – Hexah xahedral edral mesh sh Un-avera Un eraged ged Avera erage ged Pres essure ure Tem emperature perature
Circumf umferen erenti tial al averaging aging – Poly lyhedral hedral mesh Un-avera Un eraged ged Avera erage ged Pres essure ure Tem emperature perature
Un Unwra rappi pping ng - Hexahedra xahedra Meridional idional Blade ade-to to-blade blade
Un Unwra rappi pping ng - Polyh yhedra edra Meridional idional Blade ade-to to-blade blade
Radial ial Compress pressor or Validat dation ion Benchmar chmarki king ng Ideal setup (i.e. test rig setup) is run at three speeds: 100000 RPM 160000 RPM 200000 RPM Ideal al vs Vehicle cle set etup up compa mparison ison – Compressor performance deviation when vehicle ducting installed – 160000 RPM speed is chosen having the highest efficiencies on the map – Three cases compared Ideal setup Vehicle Installation no IGV Vehicle Installation with IGV 06 June 2011 GT2011-46796 IGTI 2011, Vancouver / Canada
Config igurations urations Idea eal set setup up Vehicle ehicle Installat tallation ion no IGV IGV
Volume ume Mesh Prism mesh adaptement in small clearances 06 June 2011 GT2011-46796 IGTI 2011, Vancouver / Canada
Physics sics – Steady eady perform ormance nce curve - Ideal eal Gas - K-ome omega ga SST T Al All y+ Wall Treat atme ment nt - Second nd-or order er up-wind winded ed spatia ial discretisa etisation on - Tot otal al Press ssure ure Inlet - Alter ernat ativel ely mass ss-flo flow w at off-chok choke e condition tion - Static tic Press ssure ure Out utlet - Alter ernat ativel ely mass ss-flo flow, or targe get t massf ssflow-ad adjus usted ed stati atic pressure essure - Grid Sequenci uencing ng initial tialisat isation ion - Therea eafter er, use coupled pled or segregat gated ed solver
y+ at typical ical operating rating point nt 06 June 2011 GT2011-46796 IGTI 2011, Vancouver / Canada
Performanc ormance e predicti iction on – Idealis alised ed configu gurat ration ion 06 June 2011 GT2011-46796 IGTI 2011, Vancouver / Canada
Performa ormanc nce e predict iction ion – Ideali alised sed configurat guration ion 1 2 Streamline plots with pressure contour for 3 1: PR=1.73 2: PR=2.15 3: PR=2.25 At 160000 RPM speed, ideal test setup 06 June 2011 16 GT2011-46796 IGTI 2011, Vancouver / Canada
Performanc ormance e predicti iction on – Idealis alised ed vs. Vehic icle le inst stallat allation ion 06 June 2011 GT2011-46796 IGTI 2011, Vancouver / Canada
Performanc ormance e predicti iction on – Idealis alised ed vs. Vehic icle le inst stallat allation ion A B C 18 Axial velocity distribution for A: Ideal, B: Vehicle no IGV, C: Vehicle with IGV cases
Performanc ormance e predicti iction on – Idealis alised ed vs. Vehic icle le inst stallat allation ion B C A 19 Tangential velocity distribution for A: Ideal, B: Vehicle no IGV, C: Vehicle with IGV cases
Performanc ormance e predicti iction on – Idealis alised ed vs. Vehic icle le inst stallat allation ion A B 20 C Streamline plots with pressure contour for A: Ideal Case B: Vehicle installation no IGV C: Vehicle installation with IGV At 160000 RPM and PR~2.05 06 June 2011 GT2011-46796 IGTI 2011, Vancouver / Canada
Ext xten ension sion towar ards ds low-Re e wall l resolution solution – y+ y+
Performa ormanc nce e map
Effic icienc iency curve 06 June 2011 GT2011-46796 IGTI 2011, Vancouver / Canada
Ext xten ension sion towar ards ds investi estigatin gating g Compress pressor or Noise se - Ideal Gas - DES based ed on K-omeg ega SST All y+ Wall Treatmen ent - Second-order Bounded-Central Differencing - Non-ref eflec ective e inflow ow - Mass-fl flow ow outlet et (not non-refl eflec ective) e) - Compared with static-pressure outlet - Transient initialised from steady run at “same” operating point - dt based on 1 o rotation per time-step - Segregated solver is much faster than the coupled solver
Conclusions lusions Continu ntinuing ing imp mprovem emen ents ts to STAR AR-CC CCM+ M+ simulat ation ion envi vironmen nment for tur urbomachine bomachinery Valida dati tion on of non-sim implif lified ied geome ometr tries ies with h real installati tallation on effects ects Good od predi dicti ction on of perform ormanc nce and effic icien iency cy cur urves es Starti ting ng to apply STAR AR-CC CCM+ M+ to most st challen lenging ing transient nsient flows, ws, including ding noise se THA HANK NK YOU OU
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