fluent在燃燒方面的應(yīng)用

1、 Fluent應(yīng)用 Fluent應(yīng)用 目錄本講 Fluent應(yīng)用 目錄本講 Fluent應(yīng)用 目錄本講 Fluent應(yīng)用 F-18戰(zhàn)斗機(jī)X-43高超音速飛機(jī)目錄本講 Fluent應(yīng)用 23/1/ 1999 美國風(fēng)暴的衛(wèi)星照片和預(yù)測圖象目錄本講 Fluent應(yīng)用 艦船繞流的CFD模擬目錄本講 Fluent應(yīng)用 CFD得到的汽車車身壓力分布和氣流流線目錄本講 Fluent應(yīng)用 水力發(fā)電和火電站的流動(dòng)問題CFD模擬目錄本講 Fluent應(yīng)用 化工容器及管道流動(dòng)問題室內(nèi)通風(fēng)等目錄本講 Fluent應(yīng)用 激光手術(shù)時(shí)眼球內(nèi)液體流動(dòng)目錄本講游泳、自行車等競賽 Fluent應(yīng)用 目錄本講MeshWall Sh

2、ear Stress羅茨泵羅茨泵 Fluent應(yīng)用 目錄本講煤粉爐 Fluent應(yīng)用 目錄本講 Fluent應(yīng)用 目錄本講燃燒器模擬燃燒器模擬 Fluent應(yīng)用 目錄本講流動(dòng)的分類框架圖 不可壓流動(dòng)(water)可壓流動(dòng)(air, acoustic)外部繞流(airfoil, ship)湍流Continuum Fluid Mechanics層流內(nèi)部流動(dòng)(pipe,valve)粘性非粘性 Fluent應(yīng)用 目錄本講 Fluent應(yīng)用 目錄本講控制體VAAVdVSdddVtAAV非穩(wěn)態(tài)項(xiàng)對(duì)流項(xiàng)擴(kuò)散項(xiàng)源項(xiàng) Fluent應(yīng)用 目錄本講質(zhì)量守恒方程質(zhì)量守恒方程動(dòng)量守恒方程動(dòng)量守恒方程能量守恒方程能量守恒

3、方程PDF燃燒模型燃燒模型輻射方程輻射方程 Fluent應(yīng)用 描述計(jì)算空間域的幾何形狀，重點(diǎn)是流體機(jī)械的造型：可以采用Gambit、Ug、Pro-E、AutoCad等造型；也可以自行編程給出造型。目錄本講 Fluent應(yīng)用 目錄本講說明流動(dòng)條件：流動(dòng)類型（如：層流或湍流）來流條件（如：速度、壓力）選擇計(jì)算的數(shù)學(xué)模型輻射方程、能量方程、湍流模型等 Fluent應(yīng)用 流場初始條件：1，不影響定常結(jié)果2，猜得好的初場可加快計(jì)算收斂流場邊界條件：1，決定流場結(jié)果（定常、非定常）2，包括固壁、入流、出流、遠(yuǎn)場等目錄本講 Fluent應(yīng)用 網(wǎng)格分區(qū)和生成（Gridgen）目錄本講(3D) 12 Aug 2

4、001 XYZ(3D) 12 Aug 2001 Fluent應(yīng)用 選擇設(shè)置計(jì)算的參數(shù)和選項(xiàng)：如：計(jì)算格式、CFL數(shù)、迭代步數(shù)等CFD程序計(jì)算（NAPA）：多層加密計(jì)算、判斷收斂目錄本講 Fluent應(yīng)用 流場結(jié)果后處理：通過等值圖、流線圖、XY函數(shù)曲線圖等手段對(duì)流場密度、壓力、馬赫數(shù)等參數(shù)和流速、流向等進(jìn)行分析目錄本講 Fluent應(yīng)用 準(zhǔn)確度估計(jì)：1，監(jiān)測迭代收斂精度、參考點(diǎn)參數(shù)波動(dòng)2，網(wǎng)格對(duì)計(jì)算的影響分析3，與標(biāo)準(zhǔn)實(shí)驗(yàn)數(shù)據(jù)的對(duì)比目錄本講(2D) 05 May 2000 -0.500.511.5X-0.500.51YMa0.8500.8200.7900.7600.7300.7000.6700

5、.6400.6100.5800.5500.5200.4900.4600.4300.400(2D) 05 May 2000 (2D) 05 May 2000 -0.500.511.5X-0.500.51YMa1.3001.2331.1671.1001.0330.9670.9000.8330.7670.7000.6330.5670.5000.4330.3670.300(2D) 05 May 2000 實(shí)驗(yàn)值，上表面實(shí)驗(yàn)值，下 表面計(jì)算結(jié)果實(shí)驗(yàn)值，上表面實(shí)驗(yàn)值，下表面計(jì)算結(jié)果 Fluent應(yīng)用 目錄本講 Fluent應(yīng)用 Fluent應(yīng)用 FuelAirCombustor WallManifold

6、box1123Nozzle Fluent應(yīng)用 21 Fluent應(yīng)用 進(jìn)口出口壁面內(nèi)部面孔 Fluent應(yīng)用 GambitBoundary TypeFluid TypeFluentSolverSelect BoundarySet Parameters Fluent應(yīng)用 Fluent應(yīng)用 Fluent應(yīng)用 Fluent應(yīng)用 Fluent應(yīng)用 Fluent應(yīng)用 Fluent應(yīng)用 Fluent應(yīng)用 21(1)2totalstatickTTM2/(1),1(1)2kktotal absstatic abskppM221vppstatictotalIncompressible flows:Compres

7、sible flows: Fluent應(yīng)用 absolutegaugeoperatingppp Fluent應(yīng)用 Fluent應(yīng)用 Fluent應(yīng)用 Fluent應(yīng)用 pressure-inlet (p0,T0)pressure-outlet (ps)2velocity-inlet (v,T0)pressure-outlet (ps)1orFRW2velocity inletFRW1 Fluent應(yīng)用 Fluent應(yīng)用 Fluent應(yīng)用 symmetry planes Fluent應(yīng)用 Translationally periodic planes2D tube heat exchangerf

8、lowRotationally periodic planes Fluent應(yīng)用 Fluent應(yīng)用 Fluent應(yīng)用 Fluent應(yīng)用 VertexEdgeFaceVolumeGroupBoundary LayerEdgeFaceVolumeGroupsBoundary TypesContinuum TypesCoordinate SystemsSize FunctionsG/TurboGeometry CleanupPlugin ToolsGambit 任務(wù)欄任務(wù)欄 Fluent應(yīng)用 三角形網(wǎng)格四邊形網(wǎng)格四面體網(wǎng)格金字塔型網(wǎng)格楔形網(wǎng)格六面體網(wǎng)格2D網(wǎng)格網(wǎng)格3D網(wǎng)格網(wǎng)格 Fluent應(yīng)用 EE

9、ESEEESEEEE Fluent應(yīng)用 Fluent應(yīng)用 Specify interval size, no grading, apply without meshingSpecify grading only, apply without meshingFace Mesh Generated Using Quad Pave Scheme(Pave face meshing schemes require an even number of elements on edge meshes)Face Mesh Generated Using Submap Scheme12Generateface

10、 mesh.3 Fluent應(yīng)用 Fluent應(yīng)用 Quad/Tri MapQuad/Tri PaveQuad/Tri WedgeTri PaveFace must be split to generate more than one cell acrossTriangular cellTriangular cellQuad cells Fluent應(yīng)用 Fluent應(yīng)用 Fluent應(yīng)用 maxminmax,180eeEASeeQ0(best)1(worst)maxminLargest angle in face or cellSmallest angle in face or cellAn

11、gle for equiangular face or cellemaxminmaxmine60eTri/Tete90eQuad/Hex Fluent應(yīng)用 12max, ,SCnQr rrArea or Volume of element Area or Volume of neighbor element iirjiV1jV2jV3jV4jV3D 舉例舉例QSC,i = Vj=1/Vi since j=1 has largest volume ratio Fluent應(yīng)用 Fluent應(yīng)用 Fluent應(yīng)用 Fluent應(yīng)用 Fluent應(yīng)用 MeshMeshsubmap face Flue

12、nt應(yīng)用 MeshMesh Fluent應(yīng)用 Mesh Fluent應(yīng)用 Side Faces (two hidden)CooperdirectionSource Faces Fluent應(yīng)用 Volume Containing Multiple Holessource facessource facessource facesSource Faces Not Parallelsource facesMultiple Source Faces and Multiple Interior Loops Fluent應(yīng)用 Hybrid mesh for an IC engine valve port

13、tet meshhex meshwedge mesh Fluent應(yīng)用 ABC問題問題:源面 A, B和C 已經(jīng)劃分了面網(wǎng)格. Cooper 網(wǎng)格不能劃分， 如何解決？ Fluent應(yīng)用 解決辦法解決辦法:A 、 B 與 C 面網(wǎng)格不能一一對(duì)應(yīng)，故不能劃分Cooper網(wǎng)格， 將C面網(wǎng)格刪除即可。ABC Fluent應(yīng)用 Problem:A brick is split as shown. The Cooper tool fails. Why? What can be done to generate a volume mesh?ABC Fluent應(yīng)用 Solution:Cooper tool

14、 fails because no logical axis exists. If faces A and B are source faces, then face C must be either mappable or submapple. Face C contains a void and can only be paved. Split the volume with a face as shown. Use Face A1 as one source face for volume 1 and use face C2 as one source face for Volume 2

15、.A1Volume 1Volume 2C1ABC Fluent應(yīng)用 Problem:The Cooper tool fails because the interior loops on source faces A and B either overlap or are close.ABInterior loops Fluent應(yīng)用 ABInterior loopsA1A2Solution:Split source face A as shown. Neither face A1 nor A2 contain closed interior loops. Fluent應(yīng)用 Example: manually change the vertex types3 Source FacesSESECCEEEEEE Fluent應(yīng)