The subject of BSFC and turbine back pressure came up recently.

I found this study by Caterpillar on the effect of exhaust back pressure on a turbo compound diesel engine. I have no reason to believe that the effect of back pressure would be much different on a rotary.

This shows that the effect is pretty small on the BSFC since one can obtain as much as a 20% or more improvement in BSFC by implementing turbo compound in the first place.


Paul Lamar