Overvie view w of Turbule ulent nt Reacti ting ng Flows Ou - PowerPoint PPT Presentation

Overvie view w of Turbule ulent nt Reacti ting ng Flows

Ou Outl tline ne Various ious Application ations Overvie view w of available able reacti ting ng flow models ls LES S Latest est additi tions ons Exam ample ple Cases Summa ummary

Reacting cting Flows Applic icat ations ions in STAR-CCM+ CM+ Ever-Ex Ev Expan panding ing application ion coverage rage – Gas turbine, process heaters, burners, and furnaces • Partially-premixed combustion models – High-speed jet engines (Ramjet, Scramjet) • Coupled solver with combustion models – Chemical Vapor Deposition • Detailed/Global Surface chemistry • multi-component diffusion – Aftertreatment (Automotive) • Detailed/Global Surface chemistry

Reacting cting Flows Applic icat ations ions in STAR-CCM+ CM+ – Chemical Process Industry (liquid-liquid reactions) • Finite-rate chemistry model with a flexibility to modify EOS • EMP inter/intra-phase reactions • Moment methods • Surface Chemistry – Rocket Engines (Solid, Liquid, and Hybrid) • Particle Reactions in Lagrangian • Real – Gas model with EBU Combustion – Energy Industry (Coal and Biomass combustion) • Multiple Coal Types and gas-fuel in a single simulation – Oil and Gas • Multiple-Phase reactions (intraphase and interphase)

Spray y Ph Physi sics cs for Liquid d Fuels els Prim imar ary and nd Seconda ndary y Break-up up Turbu bulenc lence e Disper ersion ion Mass s Transf sfer er Collisi llisions/C ons/Coa oales lescence ence Dr Drople plet-Wall ll Int nteractions ractions & F & Flui uid-Film Film Formation ation

Reacti acting ng Flo low w Mo Models ls in STAR AR-CCM+ CCM+ Non-Premi Non remixed d Combustio tion – EBU – PPDF • Equilibrium • Flamelet Premix ixed d Combustio tion – CFM (Choice for Laminar flame speed) – PEBU Partial Pa tially-Pr Premix mixed ed Combustion ion – PCFM • Equilibrium • Flamelet – EBU Surface ace Reactio ions ns with and witho hout ut DARS-CFD FD

Rea eacti ting g Fl Flow Mode dels in in STAR-CC CCM+ M+ Non-Prem Premixe ixed d Combustion bustion PVM PVM Complex Chemistry PPDF TFM EBU Adiabat iabatic ic /Non on-Adia Adiaba batic ic PVM Model el TFM Model del Stand andar ard d EBU Oper erat ator or Split itting ing Equil uilibri ibrium Along with Mixture re Used only y with Solve lves s for Comple lex x Facti tion, , a progre ress ss LES. . Increa rease ses s Chemist istry ry usin ing DARS-CFD CFD Infi finite tely ly fast t chemist istry. ry. Heat t Hybrid brid EBU varia riable le (chemica ical l flame thickn ckness ss Mode del. l. loss ss can be consid sidere red for enth thalp lpy) y) shows ws the by using a flame non-adia iabati tic c versio sion Combined bined Time progre ress ss of thicke ickenin ing Turbu rbule lence ce-ch chemist istry ry Scale ale EBU combusti stion. facto ctor. r. Inte tera racti ctions s usin ing Eddy y Adiabat iabatic ic /Non on-Adia Adiaba batic ic Dissip sipati tion (EDC) C). . Flam amelet elet Kinet netics ics Only ly EBU DARS RS consta stant t Used when non-equili libriu ium pressu ssure re reacto ctor r used and scala lar r dissip sipati tion rate to gene nerat ate look-up up effe fects cts are importa tant t table base sed on initi tial l condit itio ions s and Look-up table le generate rated deta tail iled chemist istry. ry. usin ing DARS steady y Flamele lets. ts. Computa tati tionall lly y less s inte tensive sive way of inco corpo rporati rating reali listi stic c chemist istry. ry.

React cting ng Fl Flow Models s in ST STAR AR-CCM+ Premix emixed d Combu bustio stion Complex Chemistry CFM TFM PEBU Used ed in 3-D LES Flam ame e area ea dens nsity ity and fuel el Fuel el mass frac actio ion n Used ed when n detail ailed d calculat lculation ions for r gas mass frac action ion trac acked ed on the e track racked ed on the e chem hemis istry ry descri riptio ion n is turbine urbine combu bustor ors. grid. id. grid. id. des esir ired ed. Pref eferr rred ed with h prem emixed ixed combu bustion ion. Uses es 1 step ep globa bal l reaction ion Spec ecie ies mass Solv lves es ODEs Typical pical choice ice of flow schem heme. Differen rent flame frac raction ions obtaine ined d and d is comput putatio ionall nally model del is segre grega gated. d. speed peed models els avail ilable: ble: using ing 1-step ep global obal inten ensiv ive. schem heme. Guil ilder der metho hod, d, Metgh ghalchi alchi method od, or User r Defined ined

Rea eacti ting g Fl Flow Mode dels in in STAR-CC CCM+ M+ Part rtially ially-Pre Premixed mixed Combustion bustion Homogeneous PCFM PVM TFM EBU Reactor PVM Model el Adiabat iabatic ic /Non on-Adia Adiaba batic ic TFM Model del Stand andar ard d EBU Oper erat ator or Split itting ing Along with Mixture re Used only y with Premixe ixed combusti stion Solve lves s for Comple lex x proce cess ss handle led with Facti tion, , a progre ress ss LES. . Increa rease ses s Che hemistry istry usin ing g DARS- Hybrid brid EBU Coheren rent t Flame Model, l, varia riable le (chemica ical l flame thickn ckness ss CFD. . Turbule lence ce-ch chemist istry ry enth thalp lpy) y) shows ws the by using a flame Inte tera racti ctions s can be Combined bined Time Non on-pre premixe ixed combu bustio stion n progre ress ss of thicke ickenin ing acco counte ted using Eddy y Scale ale EBU combusti stion. facto ctor. r. proce cess ss simula late ted using Dissip sipati tion (EDC) C). . PPDF DF. . Kinet netics ics Only ly EBU DARS RS consta stant t pressu ssure re reacto ctor r used Both th Equil ilib ibriu ium and Flamele let t models ls avail ilable le to generate rate look-up up table base sed on initi tial l for PPDF. F. condit itio ions s and deta tail iled chemist istry. ry.

Em Emissi sion on Models s in ST STAR AR-CCM+ Em Emiss issions ions Model el CO Soot NOx - Flamele elet based ed model. el. Models dels NOx trans anspo port rt equat ation ion. CO trans anspor ort equat uation ion solv lved - Uses es method hod of moment ents to with h PVM PVM Combus bustio ion n Model el Therm ermal al NOx calculat lculate part rticle icle size e distribution ibution 4dif ifferen rent models dels avai aila lable ble based ed on 3- func unction ion. step ep exten ended ded Zeldov dovic ich mechan hanis ism. - Basic ic Zeldov dovich ich model el - PPDF Equil ilibri ibrium - PPDF Flamelet elet - Flamelet elet library rary Prom ompt pt NOx Needed eded under der fuel el rich h condit nditio ions ns and d in low tempe pera rature re regions. gions. Fuel el NOx Used ed for fuels els with h nitrog rogen en cont ntent ent. Can be used ed for r a gaseous eous fuel, l, or liquid/c uid/coa oal l in the e Lagra grangia ngian n phas ases es.

Perspe spectiv ctive e view (endwall all open) ) into furnace Mesh size is 35 Million cells 02/01/12 adapco Report 531-0015-001 Page 11

Burne ner r insta talled lled geome metr try Tertiary (premixed) gas tips Tile Gas tips drilled per Zeeco GA 02/01/12 adapco Report 531-0015-001 Page 12

Temperatu perature re shown wn in two planes es in the fur urnace ce 02/01/12 adapco Report 531-0015-001 Page 13

Temperature Contours at 6” intervals: Open end perspective view Note: e: Movies ies play in “presentation mode” (SHIFT -F5) 5) 02/01/12 adapco Report 531-0015-001 Page 14

Tub ube e Heat Flux uxes es (Btu/ u/hr/f hr/ft2) t2) This is the left coils (relative to Page 11) viewed from the flame side Tube 10, upper coil Tube 10, lower coil 02/01/12 adapco Report 531-0015-001 Page 15

Heat ater er Geometr try: y: Elevat ation ion View Looking ing East Conv nvection ction Sectio ion Arch ch Tubes es Outle let Tubes es Radia diant nt Tubes es Radiant diant Inle let Tubes es Air ir Inflo low Cent nter er Wall ll 09/20 20/11 /11

Temperatu perature re Contour ours s (verti tica cal planes s throu ough gh center er of bur urner ers s 1 and 5 from m Ea East Wall) Wes est 09/20 20/11 /11 adapco apco Report 1167- Page e 17 17

LES • Algebraic and Dynamic Models • Second order implicit time differencing • Both CD and Bounded CD • Non-reflecting boundary condition • Synthetic turbulence for inflow BC • Reacting Flow - Thickened Flame Model - Algebraic approach for Mix Fr Variance 18

Sandia dia-D D Flame me LES S Simulation ulation in STAR-CCM+ CCM+ • Mesh count: 4.1 M • Polyhedrals in the vicinity of inlet • Extruded Polyhedral elsewhere • Full 360 o Pilot ot (1880 0 K) K) Fuel (CH4, 300 K)

Animat mation n - Temperature erature

Comparis parison on with Experi erimen ment t – Cent nterl erlin ine e Axial al Veloc ocity ity RMS Axia ial l Vel Mean an Axia ial l Vel

Compari parison on with Experi eriment ment – Centerl erlin ine e Mixture ture Fr RMS Mix ix Fr Mean an Mix ix Fr