Any educated guesses on efficiency loss by doing this?gruntguru wrote: ↑Thu May 17, 2018 1:56 amNeed to run galleries (green) through the compressor impeller and connect to the compressor discharge. All internal to the compressor design so should be considered "passive".
Surely the holes in the blades and the fact that some of the air is being compressed more than once as it gets recycled through the compressor will heat it up more.
I have to wonder if this will work better than simply having variable stator vanes pre compressor as are used in many gas turbines already. That would also move the surge line to the left.
IRC I had asked about this before and was told that variable geometry was allowed only banned on the exhaust side not the intake side.
So why not variable stator vanes?