Simulation of Liquid Fuel Combustion Using Dispersed Phase Modeling
In this tutorial, we provide guidelines for modeling and simulation of liquid fuel combustion employing the dispersed phase modeling. Using this model, it is possible to simulate the physics of coupled gas flow and liquid spray. In order to simulate the combustion of the vaporized fuel, we use mixture-fraction/PDF (probability density function) equilibrium chemistry model.
You will also learn how to do the following through this tutorial:
- Modeling a liquid fuel system and creating a PDF file
- Set inputs for probability density function chemistry model
- Define a discrete second phase of evaporating liquid droplets
- Using the pressure-based solver to calculate the flow field. Note: We consider the coupling between discrete liquid fuel droplets and the continuous phase.
One advantage of using mixture-fraction/PDF modeling is that it allows us to model non-premixed turbulent combustion by finding the solution of a transport equation for a single conserved scalar. It is also possible to include radicals and intermediate species in our simulations. In addition, using the assumption of equilibrium chemistry, we are able to derive the concentrations of intermediate species from the predicted mixture fraction. Property data for the species is available in the chemical database. We use a β-PDF to model turbulence-chemistry interaction.
Problem Description of Liquid Fuel Combustion
We model a 2D duct in which air is flowing at 650 K and 1.0 m/s. The Length and height of the duct are 10m and 1m respectively. We also simulate a liquid spray of pentane consisting of 100 micron diameter liquid droplets injected at 300 K over a filled spray half-angle of 30 degrees at the duct centerline. The mass flow rate of liquid fuel is 0.004 kg/s. The duct walls are held at a constant temperature of 1200 K. The Reynolds number based on inlet conditions is approximately 100,000. Therefore, the flow is turbulent. The reaction starts when pentane evaporates and enters the gas phase. We model the combustion using the mixture-fraction/PDF approach, with the equilibrium mixture of chemical species.
Mr CFD Company services
We also accept all CFD projects using ANSYS Fluent and ANSYS Workbench. We are able to solve Liquid Fuel Combustion in ANSYS Fluent. Our company has gathered experts in different engineering fields so as to ensure the quality of CFD simulations.Mr CFD Company is the first organization you can trust in to order your CFD projects online. One of our objectives is to boost the use of powerful computational fluid dynamics methods and also teach the engineers and those who seek professional knowledge in CFD.
CFD is Easy by our services. Call us for training in CFD applications and CFD packages. Our professional CFD engineers offer you the professional consultation and technical supports for your academic CFD projects and industrial CFD projects. We offer you CFD learning, CFD project by ANSYS Fluent, CFD consulting by ANSYS Fluent, CFD service by ANSYS Fluent, ANSYS Fluent project, ANSYS Fluent thesis, ANSYS Fluent simulation, ANSYS Fluent paper regeneration, ANSYS Fluent academic project, ANSYS Fluent industrial project, ANSYS Fluent research project and low CFD Price. Moreover, we have years of experience in coordinating CFD projects. Therefore, we are ready to perform your CFD simulations in different engineering fields.