Bluff-Body Mild Burner CFD Simulation
Price: $66
This project is the CFD simulation of combustion in a bluff body mild burner.
Bluff-Body Mild Burner CFD Simulation
Price: $66
This project is the CFD simulation of combustion in a bluff body mild burner.
Bluff-Body Mild Burner CFD Simulation, ANSYS Fluent Training
This project is the CFD simulation of combustion in a bluff-body mild burner by ANSYS Fluent software. In fact, a burner is a device that combines a certain amount of air with fuel in a safe space, converting fuel energy into heat energy, which also produces some gas as a result of this combustion process. The flame produced in the burner is transmitted to the interior of the chamber by two methods of convection and radiation. Therefore, the Radiation (DO) model should also be used in the present model. Also, since the combustion process takes place within the combustion chamber, the Species Transport model is also used.
The way this burner works is that the fuel is sprayed through a special jet inlet into the chamber, and the gas flows symmetrically into the chamber in four directions, thus combining the fuel and air to form the flame. Also, the operating system of the enclosure is that the gas flow path inside the chamber is cyclic and some of it exits the exhaust section and another part of it returns to the enclosure from the same circular path.
Assumption
There are several assumptions used for the present simulation:
The simulation is Steady-State, the solver is Pressure-Based, and the gravity effect is ignored.
Geometry & Mesh (Bluff-Body Mild Burner)
The 3-D geometry of the present model is designed by the Design Modeler software. Since the present model has a symmetrical structure, only one part of it is drawn at an angle of 90 degrees, and the two lateral surfaces of the present section act as symmetry boundaries. The model consists of three pipes with a small diameter called inlet ducts (two air inlets and one fuel inlet pipe) and one outlet pipe with a small diameter (exhaust).
The meshing of the present model is performed by ANSYS Meshing software. The mesh was unstructured and the element number was 1107286. In the inlet and outlet sections, the boundary layer mesh is used to increase the accuracy of fluid behavior.
CFD Simulation
Here are some summaries of the problem definition and problem-solving steps in the table:
| Models (Bluff-Body Mild Burner) | |||
| k-epsilon | Viscous model | ||
| Realizable | k-epsilon model | ||
| enhanced wall function | near-wall treatment | ||
| non-premixed combustion | Species model | ||
| discrete ordinate (DO) | Radiation model | ||
| on | Energy | ||
| Boundary conditions (Bluff-Body Mild Burner) | |||
| Velocity inlet | Inlet type | ||
| 2 m.s-1 | Velocity magnitude | air | |
| 300 K | temperature | ||
| 1 | Internal emissivity | ||
| 0 | Pollutant NO mass fraction | ||
| 0 | mean mixture fraction | ||
| 0 | mixture fraction variance | ||
| 1 m.s-1 | Velocity magnitude | fuel | |
| 300 K | temperature | ||
| 1 | Internal emissivity | ||
| 0 | Pollutant NO mass fraction | ||
| 1 | mean mixture fraction | ||
| 0 | mixture fraction variance | ||
| Pressure outlet | Outlet type | ||
| 0 Pa | gauge pressure | exhaust | |
| 1 | Internal emissivity | ||
| 0 | Pollutant NO mass fraction | ||
| 0 | mean mixture fraction | ||
| 0 | mixture fraction variance | ||
| wall | Walls type | ||
| 0 W.m-2 | heat flux | outer wall | |
| 1 | Internal emissivity | ||
| opaque | BC type | ||
| Solution Methods (Bluff-Body Mild Burner) | |||
| coupled | Pressure-velocity coupling | ||
| PRESTO | pressure | Spatial discretization | |
| second order upwind | momentum | ||
| second order upwind | energy | ||
| second order upwind | turbulent kinetic energy | ||
| second order upwind | turbulent dissipation rate | ||
| second order upwind | pollutant no | ||
| second order upwind | discrete ordinates | ||
| second order upwind | mean mixture fraction | ||
| second order upwind | mixture fraction variance | ||
| Initialization (Bluff-Body Mild Burner) | |||
| Hybrid | Initialization method | ||