I have been trying to find the way to change the ambient temperature or density keeping the oxygen percentage fixed (21%) in a preburn type constant volume chamber but could not find in any literature.
Change thermal boundary condition to the temperature what you want .
What do you mean by thermal boundary condition? Actually I was looking for which parameter do I need to change?
If I am not wrong,
PV=nRT
PV=(m/M)RT
P=(m/V) (R/M)T
ρ=PM/RT
After filling the subsequent gas by their partial pressure, let say the total pressure
is 20bar,
So for certain Oxygen Concentration(%), ρ= 22.98Kg/m3 where M=MW of Nitrogen =28...... But in reality, the mixture contains Oxygen, Nitrogen, Hydrogen, Acetylene where the major amount is Nitrogen. So, M is bit confusing then. You can change the density parameter by pressure & temperature.
The electric heater maintains ambient temperature prior to pre burn combustion and then spray combustion at your desired engine relevant condition.
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