hi guys i want to ask you something about hrr curve

[dongsan-tech]

hi guys i want to ask you something about hrr curve.

i want to maintain the hrr curve about at 21MW untill 600sec but the curve always goes down untill 600sec can somebody help me?

i place 3 of these fire obstruction at the garage.
OR somebody can explain me why the curve goes down?

[Er9y714]

HRR is an output of combustion. There might not be sufficient oxygen in the compartment to allow to combust all the fuel that is inserted. Observe the air provisions and see if the fire is under-ventilated.

[dongsan-tech]

thx for the reply have a nice day!

[Vojta-Salek]

A very similar topic is already answered here.

[drjfloyd]

If you have not done so; read all the FDS documentaiton. Pyrosim makes it easy to make an FDS input file, but it does not tell you how FDS actually works.