Turbocharger manifold design

[Ibrahim M]

What effect the angle of the merge collector have on turbo manifold design ?

Will a acute angled merge provide better spool because less K.E is lost (due to the pipes being almost inline with turbine inlet )?

Or will a obtuse angle merge works better at that due to lower volume ?

Also when designing a twinnscroll manifold, is it okay to add a small ( about 10/15cm ) length of pipe after the collectors leading to the turbine entries ?

I am after the best spool possible, so i belive i have to keep volume small, minimize pipe length for not wasting energy, no sharp bends, keep thermal dispersion as small as possible, low thermal inertia of the manifold.


One last thing how do i calculate the gas energy from heat ? (Im a bit rusty )

Thanks

 

[gruntguru]

Thermodynamic properties of exhaust gas.
Only covers stoichiometric and leaner ratios but you can probably extrapolate without too much error.