Maybe I'm just a little dyslexic, I tried re-calculating and came up with the same result as you.
70°F with 10.0:1 compression -869°F.
Not sure what I did wrong the first time.
Thanks for the correction.
ARN
Thanks Dr. D.
I am only interested in the pressure and temp just prior to ignition @ TDC(top dead center).
Reason is, knowing these values, helps in determining if the pressure and temperature are signifigant enough to create detonating or pre-ignition. Octane of the fuel requirements as...
I appreciate the help. What I am calculating, is the psi and temp changes that go on inside of a running engine.
I found a couple of formulas on your site by doing some searching. I believe they are the correct formuls that I need.
P2 = P1 (V1/V2) ^y
for pressure change, and
T2 = T1...
The gas is a fixed amount. Trapped volume in the engine world.
Does the constant have a known value. Would you mind walking me through to find the solution.
Homework Statement
Trying to calculate changes in psi and temperature with a known change of volume.
One cubic foot of air(14.7 psi) compressed to one tenth its original volume. 10:1 compression ratio.
Starting temp=70° F or 294° K
Homework Equations
Don't know the equasion. That is...