modelling heat transfers in 1D flames

[Etienne Espada]

Dear everyone, 

I'am interesting in modelling heat losses in strained 1D flames and I am interesting by the following cases that can or should be representative of what is happening in burner or gas turbine burners:

1. ImpingingJet on an inert surface. I saw that the ImpingingJet flame class is available but I didn't find any exemple of an inert surface. The idea would be to simulate a premixed flame impinging on an inert surface of a certain temperature in order to simulate the heat transfer between the flame and the surface without surface reaction, so a simpler case of what Cantera can do

2. Heat losses in counterflow diffusions flames. 

2.1 So far for such flames only radiation heat losses seems to be available however, in gas turbines configuration, a diffusion flame can stabilise on the lips of a burner, hence I was thinking of adding a sink term in energy equation to model heat losses on the flame front. 

2.2 A counterflow diffusion flame can also get close to burner wall because of thermal expansion, swirl etc. Modelling heat losses in diffusion counterflow flame was done in the past for flamelet generation manifold by adding a porous wall at a certain location. I saw in cantera documentation: ''https://cantera.org/stable/reference/onedim/governing-equations.html'', that such surface can be added at a certain location of the domain, however I didn't find any example of it. The idea would be to add a porous inert surface that would let the flow pass towards the left inlet boundary if it is place near the left inlet boundary, but this porours surface that would let the flow pass in would be inert with a certain temperature, hence creating heat losses by approaching this surface towards the flame front without changing the strain rate of the flame because the overall domain size wouldn't change, an explanation of such 1D model can be found here: "https://web.stanford.edu/group/ihmegroup/cgi-bin/MatthiasIhme/wp-content/papercite-data/pdf/ma2018nonadiabatic.pdf" or at the DOI if you have access to AIAA : https://doi.org/10.2514/1.J056539. 

Finally if you have suggestions to model heat losses in such counterflow flames I would be interested.

Thank in advance,

Best regards,

Etienne ESPADA PhD candidate at EM2C