September 27, 2022 at 12:42 amAustin MetcalfSubscriber
I'm trying to simulate the flame propogation inside a constant volume chamber using Chemkin.
My first idea was to use a Closed Homogeneous Batch Reactor - but it seems like there is no way to initiate a reaction from a point.
Is this type of simulation possible with ANSYS Chemkin-Pro?
EDIT: It seems like I am able to initiate a combustion in a 0-D Homogeneous Batch Reactor by changing the initial temperature of the Fuel + Oxidizer mixture in the tank. This helps but does not properly produce the effect of initiating the combustion from a kernel.
October 20, 2022 at 2:44 pmJudy CooperAnsys Employee
Closed Homgeneous batch reactors are intended for homegeneous processes, so there is no spatial component. To add a spatial component to the combustion, a different Chemkin model is required
2.3.5. Burner-stabilized Flame
Flame propagation in Chemkin can be done using the Flame Speed Library Reactor model.
2.3.9. Parameter Study: Propane/Air Flame Speed as a Function of Equivalence Ratio and Unburned Gas Temperature
This allows you to plot species change across the flamefront:
Both are diffusion flames. Flame propagation is fundementally a 3D process, and should be modelled with rull CFD. Chemkin can be used to generate the required flame library information to make the CFD calculations accurate, however.
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