Jet Combustion CFD Simulation by ANSYS Fluent

Description

Combustion Jet CFD Simulation, ANSYS Fluent Training

Description

This tutorial has a cylindrical domain in which air enters at a 1m/s velocity. At the same time, ethylene(C₂H₄) by three jets and a high velocity of 40m/s penetrates the solution domain, mixes with the air, and combustion occurs using the eddy-dissipation model. Top and bottom inlets enter with a 30^o degree related to the horizontal line, and their flows hit the middle inlet.

The geometry of the solution is a 2D rectangular domain whose length in the X and Y directions is 1.5m and 0.5m, respectively. Side inlets are 234mm away from the centerline of the geometry. Note that, Design Modeler software is used to create the geometry of the solution. In addition, ANSYS Meshing software is used for generating 9,928 Structured mesh grids.

This CFD project is the 13th episode of the ANSYS Fluent General Training Course

Methodology: Combustion Jet CFD Simulation

The simulation is Steady and the Pressure-based solver type is used due to the incompressibility of the working fluid. The gravitational acceleration effects are neglected. The Volumetric Reaction of the Species Transport model is used to define combustion.

Conclusion

At the end of the solution process, two-dimensional contours of pressure, velocity, temperature, and volume fractions of all materials consisted in the solution are achieved. Mass fractions of pollutants are also obtained. The side inlets’ ethylene flow moves to the domain’s centerline.

It hits the center flow so that the mixture of O2 from the air inlet mixes with the ethylene. The combustion occurs and the temperature reaches a high value. The Mass-Weighted Average of Static Temperature at the outlet surface is 1113.0554.