The Design – Combustion Design Modeler Steady-State Simulation | ANSYS CFX
Combustion, or burning, is a high-temperature exothermic redox chemical reaction between a fuel (the reductant) and an oxidant, usually, atmospheric oxygen, that produces oxidized, often gaseous products, in a mixture termed as smoke. Combustion doesn’t always result in fire, but when it does, a flame is a characteristic indicator of the reaction. While the activation energy must be overcome to initiate combustion (e.g., using a lit match to light a fire), the heat from a flame may provide enough energy to make the reaction self-sustaining. Combustion is often a complicated sequence of elementary radical reactions. Solid fuels, such as wood and coal, first undergo endothermic pyrolysis to produce gaseous fuels whose combustion then supplies the heat required to produce more of them. Combustion is often hot enough that incandescent light in the form of either glowing or a flame is produced. A simple example can be seen in the combustion of hydrogen and oxygen into water vapor, a reaction commonly used to fuel rocket engines.
In this analysis, it has been tried to analyze of Combustion Design Modeler Steady-State using the ANSYS CFX software.
Geometry & Grid
The geometry required for this analysis was generated by Ansys Design Modeler software. The meshing required for this analysis was also generated by Ansys Meshing software. The mesh type used in this analysis is unstructured. The total number of volume properties for geometry is 1,2089e-002 m³.
In this analysis, a steady-state analysis type was used to obtain the results to check the fluid flow. In this analysis, non-buoyant models have been used and stationary domain motion has also been activated in this analysis. In this analysis, a k-Epsilon model was used to study the air at 25 C flow and total energy fluid models of the heat transfer.
In this analysis, an air inlet, which only includes the air at 25 C, is defined as a velocity inlet. The normal speed value of mass and momentum velocity inlet is 120 [m s^-1]. The turbulence of the design modeler is set as a medium with an intensity equal to 5 %. The heat transfer is considered a total temperature. The static temperature of heat transfer is 300 [C].
In this analysis, a fuel inlet, which only includes the air at 25 C, is defined as a velocity inlet. The normal speed value of mass and momentum velocity inlet is 150 [m s^-1]. The turbulence of the design modeler is set as a high with an intensity equal to 10 %. The heat transfer is considered a total temperature. The static temperature of heat transfer is 300 [C].
Discretization of Equations
In this analysis, high-resolution is used for the advection scheme of the basic settings. In this analysis, the first-order is used for turbulence numerics. In this analysis, the residual type of convergence criteria is RMS and the residual target of convergence criteria is 1.E-4.
The results are presented as turbulence kinetic energy contours as well as streamlines.
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