Hello
I want to model a combustion chamber that a loudspeaker installed in its bottom to stabilize thermoacoustic instability with COMSOL Acoustic module.
In the first step(without considering the flame in chamber) I want to compute frequency response in some specific points of our chamber. As you can see in the screenshot which I have attached here, I just modeled the air inside of the chamber.
I consider that our speaker is producing pressure waves with constant amplitude of 0.05 Pa
and the outlet of the system is in atmospheric condition. My problem is that I'm not sure about the boundary conditions which I have specifid to different surfaces.
For the time being, I consider pressure boundary for the point which we have speaker, sound soft boundary for the outlet and the sound hard boundary for the remaining surfaces.
But my results are not the same as experimental ones.
I would be really thankful if somebody give me an idea about what would be the problem?
I want to model a combustion chamber that a loudspeaker installed in its bottom to stabilize thermoacoustic instability with COMSOL Acoustic module.
In the first step(without considering the flame in chamber) I want to compute frequency response in some specific points of our chamber. As you can see in the screenshot which I have attached here, I just modeled the air inside of the chamber.
I consider that our speaker is producing pressure waves with constant amplitude of 0.05 Pa
and the outlet of the system is in atmospheric condition. My problem is that I'm not sure about the boundary conditions which I have specifid to different surfaces.
For the time being, I consider pressure boundary for the point which we have speaker, sound soft boundary for the outlet and the sound hard boundary for the remaining surfaces.
But my results are not the same as experimental ones.
I would be really thankful if somebody give me an idea about what would be the problem?