Combustion, CFD Training Package, for Beginner Users
- Pollutant prediction in the combustion chamber
- Vortex flame combustion chamber
- Gas turbine combustion chamber
- Vortex combustion chamber
- Non-premixed combustion
- Flare system
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Combustion ANSYS Fluent CFD Simulation Training Package for BEGINNER Users
This training package includes 10 practical Combustion exercises using ANSYS Fluent software. MR CFD suggests this package for BEGINNER users who tends to learn the simulation process of combustion problems without any strong background.
In project number 1, the fundamentals of combustion are presented by simulating a combustion reaction inside a combustion chamber. In a gaseous state, the volatile coal mixture enters the combustion chamber and mixes with high-temperature airflow (1623 K). As a result, the combustion process takes place. This process will also result in different productions, including pollutants like NOx, SOx, etc., which will be analyzed in this project.
In project number 2, a two-dimensional combustion simulation in a gas turbine is performed. Methane-air fuel mixture combustion inside a gas turbine combustion chamber is simulated. Methane and oxygen are injected inside the combustion chamber with the velocity of 128.9304m/s and 12.0396m/s and the temperature of 286K and 109K, respectively. The fuel mixture is then ignited, and energy and heat are generated.
Like the previous project, gas turbine combustion is simulated in project number 3, but this time, the simulation is performed in three-dimensional, and diesel fuel is replaced. The fuel used in this process is diesel (C16H29), which reacts with airflow.
Vortex Combustion Chamber
The vortex combustion chamber is a new generation of liquid fuel internal combustion engines in which a whirlpool flow is created with a different arrangement of injectors.
In project number 4, a reaction is simulated inside a vortex combustion chamber. A mixture of air and methane is used as the fuel mixture. The eddy-Dissipation method has been used to investigate the chemical-turbulent interaction of reactants; the NOx anticipation model is activated.
Project number 5 simulates the vortex flame inside a combustion chamber. The airflow enters the chamber in a radial direction from four inlet sections with angles of 90 degrees relative to each other located on the outer circumference of the chamber; While the flow of methane gas as fuel from the other four inlets is sprayed directly into the interior of the chamber.
In the non-premixed type, fuel and oxidizer enter the reaction zone of the chamber through separate paths; They do not mix (premix) before fully entering the chamber. In the non-premixed model, the definition of a mixed fraction is used, which represents the mass fraction derived from the fuel flow. In project number 6, Through two separate and independent inlets, airflow (consisting of N2 with a mass fraction of 0.767 and O2 with a mass fraction of 0.233) with a temperature of 300 K and a flow rate of 1.19 kg.s-1 and fuel flow (consisting of CH4 with a mass fraction of 1 At a temperature of 300 K and a flow rate of 0.019 kg.s-1) enter the chamber to combine the chemical reaction of combustion to occur.
Steady-State & Transient Solvers
There are two options to perform a simulation. In steady-state simulations, the variables don`t consider a function of time. In project number 7, a steady-state combustion chamber is simulated. The present chamber has two air inlets. The air of the first inlet hits several blades (to circular the flow) and then enters the chamber. On the other hand, a transient model is required to consider the variable changes over time. In Project number 8, a similar problem is investigated, but the simulation is done in transient form.
The flare system, also known as a gas flare, is a combustion device used in industrial units such as oil and gas refineries and oil and gas wells, especially in offshore platforms. Gas flares are responsible for burning the natural gases released during oil extraction in a completely controlled manner. Some natural gas accumulates on top of the oil in the reservoirs during the oil extraction process. Project number 9 simulates combustion in a gas flare system. At the tip of the flare, a gas flow with a flow rate of 0.09259 kg.s-1 enters the environment in the form of a combination of hydrocarbons, and at the same time, a methane flow from the pilot flame at a speed of 2.479 ms-1 to ignite gases as well as water vapor flow enter the environment at a speed of 2.479 ms-1.
In project number 10, a two-step mechanism of combustion in a gas flare in the presence of wind flow is simulated. A mixture of methane and air is burned in a two-step mechanism; they produce a chemical reaction in two consecutive stages. Initially, methane and oxygen react to produce carbon monoxide, and then carbon monoxide combines with oxygen to produce carbon dioxide.
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