Combustion, CFD Training Package, for Intermediates

Description

Combustion ANSYS Fluent CFD Simulation Training Package for INTERMEDIATE Users

This training package includes 10 practical Combustion exercises using ANSYS Fluent software. MR CFD suggests this package for INTERMEDIATE users familiar with elementary combustion theories and simulation and who want to become professionals.

Introduction to Intermediate Combustion Simulations (Species Transport)

In the Combustion Ansys Fluent CFD Simulation package for BEGINNER users, we’ve learned Combustion’s basic theories and elementary projects. Ansys Fluent provides a species transport module to do combustion projects considering simplification of a real industrial project. For example, in project number 1, combustion inside a Boiler is performed using a species transport module. Boilers are pressurized tanks that carry out the boiling or heating fluid. The current boiler consists of two different inputs, airflow inlet, and fuel flow inlet. Airflow with a temperature of 303.15 K and mass flow rate of 3.375 kg.s^-1 enters from the side of the boiler, and a combination of several different fuels with a temperature of 300 K and mass flow rate of 0.6135 kg.s^-1 enters from the narrow pipes of the lower part of the boiler.

As another example, project number 2 simulates an Industrial FURNACE combusted with methane fuel to heat the Methane in the pipes to move the Methane more quickly and with less force.

Combustion considering the Radiation effects (Species Transport + Radiation)

In previous projects, we have ignored the heat transfer through the Radiation mechanism, although it can significantly affect the results. It is recommended to ignore radiation effects in most engineering projects, but when it comes to Combustion, normally, we’re dealing with extremely high temperatures, and this simplification cannot be a valid solution anymore.

Project number 3 is the CFD simulation of Combustion in a bluff-body mild burner. 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 from the flame. Also, the operating system of the enclosure is that the gas flow path inside the chamber is cyclic, some of it exits the exhaust section and another part of it returns to the enclosure from the same circular path.

In project number 4, the steady Combustion of Methane and air in a simple extended cubical combustion chamber is investigated. In this project, the mixture’s static temperature has a maximum of 3500K within the chamber. The chemical reaction between Methane and air produces CO2 and H2O, and since the Combustion is air-rich, oxygen and nitrogen are left unused at the end of the reaction.

Combustion in a Porous zone (Species Transport + Porous)

Project number 5 aims to model Simple Premixed Combustion in a porous zone and see how a POROUS ZONE affects combustion temperature and stabilizes it. This simulation is a matrix-stabilized burner, and results are compared to the same premixed Combustion without porosity.

Project number 6 simulates the combustion process of methane gas in a vertical Lime Kiln. The construction of a vertical lime kiln consists of two main parts, including the combustion zone and the preheating zone. In addition, porous materials have been used inside the lime kiln. The porous area is made of aluminum with a porosity coefficient of 0.3 and has an inertial resistance equal to 907.4 1.m-1 and a viscous resistance equal to 1100000 1.m-2.

Combustion considering Combusting Particles (Species Transport + DPM)

Project number 7 simulated the gas turbine combustion chamber using a discrete phase model (DPM) and species. In this case, the effect of spraying Benzene particles is done using the Eddy-dissipation combustion model. This combustion chamber is commonly used for jet engine users.

Due to the increasing industrial use of coal consumption and the importance of finding clean energy coal technology development, modeling its combustion characteristics is very important. In project number 8, a combustion chamber is simulated. We have used two-way DPM for particles and anthracite as an injection material.

Comprehensive Combustion simulation(Species Transport + Radiation + DPM)

The gasification process is defined as the conversion of biomass raw materials into synthesis gas.

Project number 9 simulates the biomass combustion process inside a gasifier chamber. The material used for Combustion is biomass, which reacts with the oxidizer. Also, the incoming fuel must enter the chamber as discrete particles; This means that the injection of this substance into the chamber is defined based on the Lagrangian view. Therefore, the Discrete Phase Model has been used. Also, since there is radiant heat energy from the flames in the combustion process, the Radiation model is defined.

Combustion considering the compressibility of the fluid

In many engineering applications, the compressibility of the working fluid could be an essential component that needs to be considered.

Scramjets are a type of ramjets that can travel at hypersonic speed while there is no motion device in its engine. In project number 10, Hypersonic Combustion in a Scramjet engine with Viscous is simulated. The Mach number of inlet air is set to 6, and the temperature of the whole domain equals 300k.