AVL-fire软件的应用.doc

AVL-fire软件的应用学院：能源学院 专业：动力机械及工程姓名：吴家平学号：M200770779以下是发动机缸内燃烧三维仿真模拟，包括移动网格的绘制和缸内燃烧的过程的动态反应。HD ENGINE EXAMPLE1、Meshing Process1.1 Load Project从FIRE/8.3/exam/904_HD_Engine/Start_Data/mesh中导入bowl_edge, compensation_edge and edge_sweep meshes，调整视角为俯视，出现如下图形：1.2 Meshing Method其中bowl_edge(1)如下：对其进行处理： 选中bowl_edge(1)，右键调出其properties,勾选pointsbowl_edge（1）变为：从菜单栏view中选application bar中的FH或从右边框中选FH，再从中选中edge tools,再选取其中的2D Meshing，出现一个对话框，选中项目interpolation,显示如下：点选pick 4 points按钮，并将下面的四个单选框设置为选中状态，在bowl_edge（1）中选取四个边缘点，软件会根据你选取四个点的顺序以此编号为1、2、3、4，其中43是新生成的线，所以12，23，14选为keep line而43为new line，subdiy中，12间刚好为四个间距，所以输入4，23无需确定，显示为阴影区域，compression为默认值。 勾选change input edge mesh.change input edge mesh is required to apply all created modifications to the edge mesh as they will be necessary for the further meshing process.选择Interpolation to perform the process and then选择Cancel to exit.结果如图所示：生成的网格名称为：TFI_1_of_bowl_edge_1(1) 选中bowl_edge（1）从FH中选则selections,出现如下对话框：Type选为cell，name随意取名，如输入compensation,点击creat and modify,出现如下对话框:将add by polygon改为add by angle,angle默认为40。点击define，将包围网格TFI_1_of_bowl_edge_1(1)的三条边分别选中，三条线段高亮度显示：三条线段构成的整体便是compensation，选择其selections中的view项，在name中勾选compensation，然后apply,则compensation将脱离bowl_edge(1)而单独显示在窗口中：选中compensation，右键选中cut，则bowl_edge(1)将自动显示在桌面上：选择FH - Mesh Tools - Connect,在选择其中的Conform connect然后Calculate default value，目的是使其具有一致连续性，消除小节点。 选择edge tools中的2D Meshing，选取其中的项目paving,填写其中的内容如下图：生成的图如下，名称为PAVINGMESH_1_of_bowl_edge_1(1)其中最外面一薄层，指的是number of constant thickness cell layers=1如果是2，则为两层：Row adjustment delay是网格的内部参数，此时输入6，如改为其他值，则相应发生变化，如为5时，则有：对compensation_edge(1)进行同样的操作，可以画出类似的网格。此时Number of constant thickness cell layers为2，其他的值不改变。生成的名称为PAVINGMESH_1_of_compensation_edge_1(1)1.3 join meshesTFI_1_of_bowl_edge_1(1)、PAVINGMESH_1_of_compensation_edge_1(1)、PAVINGMESH_1_of_bowl_edge_1(1) 同时显示在桌面上。选择Connect from Mesh Tools in the FH Application Bar. 打开Join Meshes同时选中TFI_1_of_bowl_edge_1(1)、PAVINGMESH_1_of_compensation_edge_1(1)、PAVINGMESH_1_of_bowl_edge_1(1)选择 Join Meshes to perform the process and a new mesh named Joined_1 appears in the project tree。选中Joined_1 and 选择the Conform connect tab，选择Calculate default value then 选择Conform connect to perform the process and then 选择Cancel to exit.1.3 Enlarge 1、选择Enlarge from Mesh Tools in the FH Application Bar2、选择the Rotate tab and click on the Joined_1 mesh in the working area3、Enter 15 for Number of Subdivisions and +45 for Angle.4. 选择the Z axis for rotation5.选择Rotate to perform the process and then 选择Cancel to exit。生成的图形如下,名称为rotated_1_of_Joined_1_1(1)。 6. 选择Front Position，调整视图到如下：7.选择the rotated_1_of_Joined_1 to bowl ,打开selections，创建包括定面的face by using Angle by Angle option,如下图：在view tab中，选择the top,选择apply and click ok to exit。8选择the Extrude tab from the Enlarge tool and click on the rotated_1_of_Joined_1_1（1） to bowl mesh in the working area9. 选择Predefined distribution10. 选择edge and click on edge_sweep in the working area11. 选择Vector and enter 0 for x, 0 for y and 1 for z12. 选择Extrude and then 选择Cancel to exit and a new mesh named bowl_1 appears13. In the Selections View window, deactivate the top selection生成enlarge_1_of_Joined_1_1_1(1)同时选中rotated_1_of_Joined_1_1（1）和enlarge_1_of_Joined_1_1_1(1)选择Join Meshes to perform the process and a new mesh named Joined_2 appearsin the project tree14 Click on the Joined_2 mesh in the working area15. 选择the Conform connect tab and check that Joined_2 is the selected mesh16. 选择Calculate default value to calculate the appropriate tolerance value and then选择Preview to view the modification17. 选择Conform connect to perform the process and then 选择Cancel to exit18 Rename the mesh Joined_2 to HD_Engine_18019.选择info 中Check to perform the process and then 选择Cancel to exit. There should be noNegative Normals and the mesh should look similar to the following figure. If there are Negative Normals, the orientation of the patches of the 2D mesh should be checked。结果如下：2. Generate Moving Mesh2.1 Define Selections for Moving Mesh选中HD_Engine_180，通过selections来创建下表cylinder整个几何体（42060cells）buffer除了bowl和顶层之外的部分(26220cells)bowl勺子部分及与勺子部分相接的与气缸壁接触的部分(14460cells)2.2 Define Selections for Boundary Conditionshead活塞顶部(1380cells)Liner活塞的外部半径(360cells)Radius燃烧室半径(428cells)Cyclic活塞剖面一(2804cells)Cyclic_rot活塞剖面二(2804cells)Comp_vol与勺子和气缸壁接触的外表面(165cells)Pistpn_movW燃烧室的外表面(1545cells)Comp_vol_moving与勺子和气缸壁接触的内表面(240cells)所有的创建的特征如下：2.3 Define the Connection of the Cyclic Boundary1. 选择FH - Mesh Tools - Connect Application Bar2. Click on the HD_Engine_180 mesh in the working area3. 选择the Boundary connect tab4. 选择Add and Boundary_connection1 is automatically entered in the field5. 选择Conform surface meshes, as the cell distribution is the same on each side of theInterface6. 选择cyclic from the interface A pull-down menu and cyclic_rot from theinterface B pull-down menu7. 选择Conforming surface meshes8. 选择Boundary connect to perform the process and then 选择Cancel to exit结果如下：2.4 Moving the Mesh from 180CA to 320CA1. 选择FAME Engine from Create Mesh in the FM Application Bar2. In the Meshes window, 选择选择mesh and click on the HD_Engine_180 mesh inthe working area3. Enter 180 for Angle and then 选择Create Moving Set. HD_Engine_180180.000 appears in the list below4. 选择the Moving mesh parts tab and enter Piston for Name of moving part5. 选择Add moving part.6. 选择bowl from the Moving selection pull-down menu, buffer from the Bufferselection pull-down menu and cylinder from Interpolation selection pull-down menu.7. 选择Piston Displacement Function and enter the following:Conrod: 0.265 Stroke: 0.1651 Piston offset: 0 Point 1 of axis: 0, 0, 0Point 2 of axis: 0, 0, 18. 选择the Control center tab and enter the following:Startangle: 180 Endangle: 320 Angle increment: 20 Interpolation increment: 09. 选择Move and then 选择Save Moving Sets. 选择Close to exit2.5 Generating the Rezone Mesh at 320CA在上部分选择Move and then 选择SaveMoving Sets之后，将产生HD_Engine_180_moving(2)Open the mesh HD_Engine_180_moving(2) as shown in the following figure。1.Rename the copied mesh to HD_Engine_320，上面的图片就是活塞处于曲轴转角为320度时所处的位置2. 选择FH - Mesh Tools -Refine - Redimension and ensure that HD_Engine_320is already selected3.选择Create and define two neighboring points to define the direction，选中的方向将高亮度显示。4.Pick and click on the first cell of the range to define the Start cell. Repeat this for Endcell.5.选择Find layers and Layer_0 appears under Layer list. 选择Layer_0 in the Layerlist to6. Enter 10 for the Number of distributions and keep the Compression factor at 1.7.选择Redimension to perform the process and refer to following figure for the finalstate. Those selections, which have been modified by redimension will be set to zero。完毕之后，在first point和second point间将均匀分布10层网格。2.6 Check Selections for Moving Mesh and BoundaryConditionsSelections - View Window (HD_Engine_320)1. Check the Boundary connectivity as described in section 3.2.4.3. If it is missing thenredefine it.2. Check the Conform connectivity as described in section 3.2.3.4. If it is missing thenredefine it.2.7 Moving the Mesh from 320CA to 340CA1. 选择FAME Engine from the FM Application Bar.2. In the Meshes window, 选择选择mesh and then click on the HD_Engine_320mesh in the working area.3. Enter 320 for Angle.4. 选择320.000 in the status row (HD_Engine_180 320.000) with the left mousebutton.5. 选择Append mesh and Rezone 320.000 appears in the list.6. 选择the Control center tab and enter the following:Startangle: 320Endangle: 340Angle increment: 10Interpolation increment: 07. 选择Move and then Save Moving Sets. 选择Close to exit2.8 Generating the Rezone Mesh at 340CA1. Open the mesh HD_Engine_180_moving(4)4. 选择Redimension from the Mesh Tools in the FH Application Bar and ensure thatHD_Engine_320 is already selected.5. 选择Create and define two neighboring points to define the direction, where the newdistribution is required. The selected direction is marked by highlighted cells.6. Define the range for the new cell distribution as shown in Figure 3-13. Therefore selectPick and click on the first cell of the range to define the Start cell. Repeat this for Endcell.7. 选择Find layers and Layer_0 appears under Layer list. 选择Layer_0 in the Layerlist to get access to the input fields below.HD_Engine_3408. Enter 5 for the Number of distributions and keep the Compression factor at 0.9. 选择Redimension to perform the process. Those selections which have been modifiedby redimension will be set to zero.2.9 Check Selections for Moving Mesh and BoundaryConditionsSelections - View Window (HD_Engine_340)2.10 Moving Mesh from 340 to 360 and 360 to 3801. 选择FAME Engine from the FM Application Bar.2. In the Meshes window, 选择选择mesh and then click on the HD_Engine_340mesh in the working area.3. Enter 340 for Angle.4. Click on 340.000 in status row HD_Engine_180. 选择Append mesh and Rezone340.000 appears in the list.5. 选择the Control center tab and enter the following:Startangle: 340Endangle: 360Angle increment: 56. 选择Move and then Save Moving Sets.7. 选择the Control center tab and enter the following:Startangle: 360Endangle: 380Angle increment: 58. 选择Move and then Save Moving Sets. 选择Close to exit.点击hd_engine_180_moving右键，单击open按钮，跳出如上对话框：其中，1hd_engine_180_moving 2hd_engine_320_moving3hd_engine_320_moving4hd_engine_340_moving5hd_engine_340_moving6hd_engine_360_moving7hd_engine_380_moving其对应如下：Hd_engine_180180.0320.0Rezone320.0340.0Rezone340.0360.0380.0HD_Engine_3602.11 Append the Final MeshesThe idea is to finish the mesh movement with existing meshes.Repeat the following procedure for each mesh as listed in Table 3-1:1. 选择the relevant (e.g. HD_Engine_180_moving(4) mesh in the project tree and选择Open.2. 选择FAME Engine in the FM Application Bar.3. In the Meshes window, 选择选择mesh and then click on the mesh in the workingarea.4. Enter the value for Angle (e.g. 380) as shown in table below and 选择the last mesh inthe status row (e.g. 380.000). Refer to section 3.2.4.9 for Rezoning.5. 选择Append mesh and then close the mesh.MeshAngle ValueHD_Engine_180_moving(4)380 (rezone)HD_Engine_180_moving(3)400HD_Engine_180_moving(2)400 (rezone)HD_Engine_180_moving(1)5406. Save Moving Sets in the Control Center tab and return to step one and startprocedure with next mesh.其实，HD_Engine_180_moving(4)就是340，位置与380重叠，同理可推HD_Engine_180_moving(3)是320，位置与400重叠；HD_Engine_180_moving(2)是320，位置与400重叠和HD_Engine_180_moving(1)是180，位置与540重叠。所以最后有：1hd_engine_180_moving 2hd_engine_320_moving 3hd_engine_320_moving4hd_engine_340_moving 5hd_engine_340_moving 6hd_engine_360_moving7hd_engine_380_moving 8hd_engine_380_moving 9hd_engine_400_moving10hd_engine_540_movingHd_engine_180180.0320.0Rezone320.0340.0Rezone340.0360.0380.0Hd_engine_180380.0400.0540.0其生成的移动网格分别如下图; HD_Engine_320HD_Engine_180 HD_Engine_340HD_Engine_360 HD_Engine_380 HD_Engine_400 HD_Engine_5403.12. Dummy Run1. In FAME Engine, 选择the Dummy Run tab and enter the followingStartangle: 180Endangle: 540Interpolation increment: 52. 选择Start Dummy Run and then 选择Close to exit3. Close all meshes4. 选择File | Save and save the project在此过程中，活塞将按照创建的移动网格进行动态地移动。3 Define Data for Calculation1、In the project tree, 选择the Calculation folder with the right mouse button and then选择New Case (FIRE) / HD_Engine_180_moving.flm.2、A new Case folder is created where all necessary data for the solver and post-processing arestored3、选择Solver Steering File in the project tree and 选择Edit SSF from the submenu.Enter the following input values for this example (values not specified are default):3.1. Run Mode选择Run mode in the parameter tree and then 选择Crank-Angle from the pull-downmenu3.2. Module Activation选择Species transport, Combustion and Spray.3.3 Boundary ConditionsIn the Boundary conditions folder in the parameter tree, 选择BC1: NoName to accessthe following input fields:Insert a new boundary condition by selecting Boundary conditions in the parameter treewith the right mouse button and selecting BC: Insert from the submenu.选择BC2: NoName to access the following input fields:Insert a new boundary condition as described above and 选择BC3: NoName to accessthe following input fields:Insert a new boundary condition as described above and 选择BC4: NoName to accessthe following input fields: Insert a new boundary condition as described above and 选择BC5: NoName to accessthe following input fields: Insert a new boundary condition as described above and 选择BC6: NoName to accessthe following input fields:Insert a new boundary condition as described above and 选择BC7: NoName to accessthe following input fields:3.3. Fluid Properties (Air)In the Fluid properties folder in the parameter tree, 选择FP1: NoName to access theFluid properties of input field. 选择Air from the pull-down menu.3.4. Initial Conditions选择Initial conditions in the parameter tree to access the following input fields:3.5. Solver ControlIn the Solver control folder in the parameter tree, 选择the following in the parametertree to access the relevant input fields:3.6 Output Control选择the following in the parameter tree to access the relevant input fields:1. Write 2D result file (.fl2)The 2D result file contains the output of mean values of flow quantities from thesimulation for the whole domain or selection based.Mean values for the whole domain选择Write 2D result file in the parameter tree and activate the toggle switches forFlow quantities, Turbulence quantities and Wall summary.Mean values selection basedInsert a new field by selecting Write 2D result file in the parameter tree with the rightmouse button and selecting 2D: Insert from the submenu.Then 选择2D1:NoName and 选择the cylinder selection from the pull-downmenu. Activate the toggle switches for Flow quantities.2. Write 3D result file (.fl3)Enter the values shown for Output frequency in a Table选择the following parameters3. Write restart file (.rs0, .rs1)选择Write restart fileOutput frequency 54. Write backup file (.bc_0050, .bc_0100, etc)选择Write backup fileOutput frequency 50选择File | Save and save the project3.7. ModulesRefer to the relevant module manual for further information3.8. Start CalculationThe Restart funct