Performance ormance and nd No Noise se Issue ues Fred Mendona, - - PowerPoint PPT Presentation

Valid idation ation of Radial al Turbomac bomachiner hinery Performance

• rmance and

nd No Noise se Issue ues

Fred Mendonça, donça, CD-adapco dapco

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

• n of radial

l com

• mpres

resso sor r performance

• rmance map

– High-Re vs Low-Re wall resolution – Installation effects

Trans nsien ient t calcula ulati tion

• n, delving

ving into

• compre

ress ssor

• r nois

ise Out utloo

• ok

k

Overvie view

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 Un-avera eraged ged Avera erage ged Pres essure ure Tem emperature perature

Un Un-avera eraged ged Avera erage ged Pres essure ure Tem emperature perature

Circumf umferen erenti tial al averaging aging – Poly lyhedral hedral mesh

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

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

Radial ial Compress pressor

• r Validat

dation ion

Idea eal set setup up Vehicle ehicle Installat tallation ion no IGV IGV

Config igurations urations

06 June 2011 GT2011-46796 IGTI 2011, Vancouver / Canada

Prism mesh adaptement in small clearances

Volume ume Mesh

Physics sics – Steady eady perform

• rmance

nce curve

• Ideal

eal Gas

• K-ome
• mega

ga SST T Al All y+ Wall Treat atme ment nt

• Second

nd-or

• rder

er up-wind winded ed spatia ial discretisa etisation

• n
• Tot
• tal

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

06 June 2011 GT2011-46796 IGTI 2011, Vancouver / Canada

y+ at typical ical operating rating point nt

06 June 2011 GT2011-46796 IGTI 2011, Vancouver / Canada

Performanc

• rmance

e predicti iction

• n – Idealis

alised ed configu gurat ration ion

16

06 June 2011 GT2011-46796 IGTI 2011, Vancouver / Canada

1 2 3

Streamline plots with pressure contour for 1: PR=1.73 2: PR=2.15 3: PR=2.25 At 160000 RPM speed, ideal test setup

Performa

• rmanc

nce e predict iction ion – Ideali alised sed configurat guration ion

06 June 2011 GT2011-46796 IGTI 2011, Vancouver / Canada

Performanc

• rmance

e predicti iction

• n – Idealis

alised ed vs. Vehic icle le inst stallat allation ion

18

A B C

Axial velocity distribution for A: Ideal, B: Vehicle no IGV, C: Vehicle with IGV cases

Performanc

• rmance

e predicti iction

• n – Idealis

alised ed vs. Vehic icle le inst stallat allation ion

19

A B C

Tangential velocity distribution for A: Ideal, B: Vehicle no IGV, C: Vehicle with IGV cases

Performanc

• rmance

e predicti iction

• n – Idealis

alised ed vs. Vehic icle le inst stallat allation ion

20

06 June 2011 GT2011-46796 IGTI 2011, Vancouver / Canada

A B 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

Performanc

• rmance

e predicti iction

• n – Idealis

alised ed vs. Vehic icle le inst stallat allation ion

Ext xten ension sion towar ards ds low-Re e wall l resolution solution – y+ y+

Performa

• rmanc

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

• r 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

• w
• Mass-fl

flow

• w 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 1o rotation per time-step
• Segregated solver is much faster than the coupled solver

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

• n of non-sim

implif lified ied geome

• metr

tries ies with h real installati tallation

• n effects

ects Good

• d predi

dicti ction

• n of perform
• rmanc

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

Conclusions lusions