TAGGED: cfd-combustion, dpm, injection, non-premixed-combustion
-
-
July 17, 2024 at 4:17 am
Zwernjayden
SubscriberI need to model Ethanol and Lox combustion in chamber with a converging diverging nozzle attached. Fuel and Ox are atomized by injector at inlets. What would be the best way to do this. Non-premixed combustion? Do I need a flamelet? Should I use traditional inlets or DPM injections? Do I need multiphase and how would I set that up?
-
July 18, 2024 at 2:12 pm
Vijay Narayan
Ansys EmployeeHi Jayden,
Below are a few comments to get you started.
a) If Atomization modelling is needed: then VOF-to-DPM modelling would be required.
To keep it simple, we can assume only DPM injection (and capture the DPM particle size corresponding to secondary breakup). Regular DPM alone doesnt require Multiphase module to be activated.
Chapter 21: Modeling Evaporating Liquid Spray (ansys.com)
b) Are you modelling a detailed mechanism or a few steps reaction. This could guide you to choose PDF based or Species Transport model. I think: with species transport - you can model both fuel and oxidizer as DPM and each evaporating to their respective gaseous component. Whereas in PDF based model, you could only model either the oxidizer or fuel as DPM (In general Fuel is modelled as DPM, but if you choose to model oxidizer as DPM, then you would have to flip the specification of fuel and oxidizer in the combustion model setup panel).
Within PDF models, you can also stick with equillibrium option instead of going in the path of flamelets (to start with).
I hope the above response helps.
Regards
-
July 19, 2024 at 12:14 am
Zwernjayden
SubscriberSorry I forgot to reply in the thread to notify you. Check my reply below
-
-
July 18, 2024 at 2:54 pm
Zwernjayden
SubscriberÂ
Â
Ok thank you. If I am using a plain oriface atomizer , do I still need an traditional inlet boundary condition defined at the same location and diameter using the injector pressure? Or does the atomizer takes its place.
Â
Â
Â
Â
-
- The topic ‘Ethanol-Lox Combustion’ is closed to new replies.
- How do I get my hands on Ansys Rocky DEM
- Non-Intersected faces found for matching interface periodic-walls
- Unburnt Hydrocarbons contour in ANSYS FORTE for sector mesh
- Help: About the expression of turbulent viscosity in Realizable k-e model
- Script Error
- Mass Conservation Issue in Methane Pyrolysis Shock Tube Simulation
- Facing trouble regarding setting up boundary conditions for SOEC Modeling
- convergence issue for transonic flow
- Running ANSYS Fluent on a HPC Cluster
- Point exception in erosion calculation
-
1902
-
807
-
599
-
591
-
366
© 2025 Copyright ANSYS, Inc. All rights reserved.